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PHYSICS
1
Which of the following statements is not true about the properties of pressure in a liquid?
Options:
A) Pressure at any point in a liquid is at right angles in all directions.
B) Pressure is the same at all points on the same horizontal plane in a liquid.
C) Pressure decreases with height, and is independent of the shape and volume of the container.
D) Pressure is dependent on the shape and volume of the container.
Summarizing Gauge Pressure and Absolute Pressure | Fluid Statics
2
Which of the following is not a Newton’s law of motion?
Options:
A) The time rate of change of linear momentum is directly proportional to the external force applied and it takes place in the direction of the force.
B) In the absence of external forces, an object at rest remains at rest and an object in motion continues in motion with a constant velocity.
C) If two objects interact, the force F12F_{12}F12 exerted by object 1 on object 2 is equal in magnitude and opposite in direction to the force, F21F_{21}F21 , exerted by object 2 on object 1.
D) In the presence of external forces, an object at rest remains at rest and an object in motion continues in motion with a constant velocity.
Summary and Main Ideas | Force and Newton’s Laws of Motion
3
A force of 20N is applied to a spring of elastic spring constant of 200N/m. Calculate the energy stored in the spring.
Options:
A) 2.50 J
B) 0.25 J
C) 400 J
D) 40.0 J
E) 1.0 J
Potential Energy of a Spring | Work, Energy and Energy Resources
4. Which of the following is not a self-luminous object?
Options:
A) Glow-worm
B) Star
C) Moon
D) Sun
5. Which of the following is not an application of Total Internal Reflection?
Options:
A) Mirage
B) Binoculars
C) Optical Fibers
D) Driving mirror
The reading on ADE temperature scale at the ice melting point is 40°C and 80°C at the steam point. Calculate the reading on the Celsius scale equivalent to 50°C.
Options:
A) 25°C
B) 40°C
C) 45°C
D) 60°C
Temperature Scales | Temperature, Kinetic Theory, and Gas Laws
7
Calculate the heat required to convert 10g of ice at -10°C to water at 50°C. The specific heat capacity of ice and water are 2100 J/kgK and 4200 J/kgK respectively. The latent heat of Fusion of ice is 3.4 × 10^5 J/kg.
Options:
A) 2.10 kJ
B) 4.20 kJ
C) 3.21 kJ
D) 5.71 kJ
Mechanical Equivalent of Heat | Heat and Heat Transfer Methods
- 8
Calculate the acceleration of the system (in terms of the acceleration due to gravity, g), when it is released.
Options:
A) 0.38g
B) 0.13g
C) 0.15g
D) 0.39g
Summary and Main Ideas | One-Dimensional Kinematics
- 9
A train starting from rest accelerates at the rate of 6 m/s² for 20 seconds to attain a constant speed and it further travels for another 20 seconds and decelerates at a rate of 3 m/s² for 20 seconds. Calculate the total distance (in kilometers) traveled by the train.
Options:
A) 4.0 km
B) 5.4 km
C) 4.8 km
D) 3.6 km
More Examples on Subway Train Motion | One-Dimensional Kinematics
- 10
Anomalous behavior of water refers to
Options:
A) Boiling of water at 100°C
B) Freezing of water at 0°C
C) Contraction of water when it is heated between 0°C and 4°C
D) Evaporation of water at ambient temperature
- 11
Which of the following statements is true about a collision event?
Options:
A) In an elastic collision, both linear momentum and kinetic energy are conserved.
B) In an elastic collision, linear momentum is conserved but kinetic energy is not conserved.
C) In an elastic collision, both linear momentum and kinetic energy are conserved.
D) In an elastic collision, kinetic energy is conserved but linear momentum is not conserved.
Inelastic Collisions | Momentum and Impulse
- 12
Which of the following is the function of a p-n junction semiconductor device?
Options:
A) It transforms a direct voltage to AC voltage.
B) It steps up an AC voltage.
C) It steps down an AC voltage.
D) It transforms AC voltage to direct voltage.
Resistors in an AC Circuit | Electromagnetic Induction and AC Circuits
- 13
The surface tension of water can be reduced by adding the following except
Options:
A) Detergent
B) Oil
C) Grease
D) Sand
Surface Tension | Fluid Statics
- 14
Which of the following is not an eye defect?
Options:
A) Astigmatism
B) Hypermetropia
C) Presbyopia
D) Malaopia
Summarizing Physics of the Eye | Vision and Optical Instruments
- 15
Calculate the energy stored in a capacitor of capacitance 50 μF when a voltage of 220 V is applied to its terminals.
Options:
A) 2.0 Joule
B) 1.0 Joule
C) 3.0 Joule
D) 4.0 Joule
E) 1.2 Joule
Energy Stored in Capacitors | Electric Potential and Electric Field
- 16
A material of threshold frequency 4.5 × 10⁻¹⁹ Hz was bombarded with photons of frequency 8.0 × 10¹⁵ Hz. What is the kinetic energy of the emitted photoelectrons (in eV)? (h = 6.60 × 10⁻³ Js, 1 eV = 1.6 × 10⁻¹⁹ J)
Options:
A) 2.81 eV
B) 2.19 eV
C) 5.00 eV
D) None of the above
Kinetic Energy and the Ultimate Speed Limit | Special Relativity
- 17
Which of the following combinations of factors do not affect evaporation?
Options:
A) (vii) and (viii)
B) (i), (ii), (iii)
C) (iii), (iv), (v), (vi)
D) (i), (ii), (iii), (iv), (v)
Summarizing Humidity, Evaporation, and Boiling | Temperature, Kinetic Theory, and Gas Laws
- 18
A solid is said to sublime if it changes from
Options:
A) Solid to liquid state
B) Solid to molten state
C) Solid to gaseous state
D) Solid to solid state
Predicting the Sign of Δs | Thermodynamics
- 19
Adeoye moves a distance of 4.0 km from a point A on a bearing of N30°E to a point B and then a distance of 3.0 km on a bearing of S60°E to a point C. Calculate Adeoye’s resultant displacement from point
Options:
A) 10 km, N60°E
B) 5 km, N67°E
C) 3 km, S30°E
D) 4 km, N45°E
Determining Resultant Displacement | Two-Dimensional Kinematics
- 20
A student observes that a certain sound wave is 0.10m long and travels with a speed of 340 m/s. What is the frequency of the sound wave?
Options:
A) 3400 Hz
B) 340 Hz
C) 2500 Hz
D) 3000 Hz
Summary and Main Ideas | Wave Properties
- 21
A lamp which is rated 100W/220V operates for 30 minutes. How much energy is consumed by the lamp?
Options:
A) 1.8 MJ
B) 3.6 kJ
C) 1.8 kJ
D) 3.6 MJ
Electric Power and Energy | Electric Current and Circuits
- 22
An object weighs 2 N in air and weighs 1.5 N in water. What is the upthrust?
Options:
A) 0.5 N
B) 1.0 N
C) 1.5 N
D) 2.0 N
Buoyancy and Upthrust | Fluid Statics
- 23
What is the magnitude of the acceleration due to gravity on the surface of the moon if the value of g on the earth is 10 m/s²?
Options:
A) 1.6 m/s²
B) 2.0 m/s²
C) 3.0 m/s²
D) 4.0 m/s²
Summary and Main Ideas | Universal Gravitation
- 24
The distance between two points on a straight road is 50 m and the time taken to travel this distance is 10 seconds. What is the average speed of the vehicle?
Options:
A) 2 m/s
B) 5 m/s
C) 10 m/s
D) 20 m/s
Calculating Speed and Velocity | One-Dimensional Kinematics
- 25
A metallic rod of length 5 m and cross-sectional area 2 cm² is stretched by a force of 600 N. If the Young’s modulus of the rod is 2 × 10¹¹ N/m², what is the extension in the rod?
Options:
A) 0.01 m
B) 0.02 m
C) 0.05 m
D) 0.10 m
Calculating Young’s Modulus | Properties of Materials
- 26
What is the equivalent resistance of three resistors of 10 Ω, 20 Ω, and 30 Ω connected in series?
Options:
A) 60 Ω
B) 30 Ω
C) 20 Ω
D) 10 Ω
Series and Parallel Resistors | Electric Current and Circuits
- 27
What is the work done in moving a charge of 2 C through a potential difference of 5 V?
Options:
A) 10 J
B) 20 J
C) 5 J
D) 2 J
Work Done in Moving Charges | Electric Potential and Electric Field
- 28
A body is dropped from a height of 80 m. Neglecting air resistance, calculate the time taken for the body to reach the ground. (Take g = 10 m/s²)
Options:
A) 4.0 s
B) 8.0 s
C) 5.0 s
D) 6.0 s
Time of Free Fall | One-Dimensional Kinematics
- 29
The photoelectric effect was first observed by
Options:
A) Einstein
B) Hertz
C) Planck
D) Newton
Photoelectric Effect | Quantum Physics
- 30
What is the maximum kinetic energy of photoelectrons emitted from a metal surface if the work function of the metal is 2.0 eV and the incident photon energy is 5.0 eV?
Options:
A) 3.0 eV
B) 4.0 eV
C) 5.0 eV
D) 7.0 eV
Kinetic Energy and the Photoelectric Effect | Quantum Physics
- 31
An object is moving with an initial velocity of 20 m/s and decelerates at a rate of 4 m/s². Calculate the time required for the object to come to a stop.
Options:
A) 4 s
B) 5 s
C) 6 s
D) 7 s
Deceleration and Time of Stop | One-Dimensional Kinematics
- 32
If the mass of a planet is mpm_pmp and radius is rpr_prp , the acceleration due to gravity on the planet’s surface is given by
Options:
A) Gmprp2\frac{G m_p}{r_p^2}rp2 Gmp
B) Grpmp2\frac{G r_p}{m_p^2}mp2 Grp
C) Grp2mpG \frac{r_p^2}{m_p}Gmp rp2
D) rp2Gmp\frac{r_p^2}{G m_p}Gmp rp2
Gravitational Acceleration | Universal Gravitation
- 33
Calculate the centripetal force acting on an object of mass 2 kg moving in a circle of radius 5 m with a speed of 10 m/s.
Options:
A) 4.0 N
B) 8.0 N
C) 20 N
D) 40 N
Centripetal Force | Circular Motion
- 34
Which of the following types of waves does not require a medium for propagation?
Options:
A) Sound waves
B) Water waves
C) Electromagnetic waves
D) Seismic waves
Wave Propagation | Wave Properties
- 35
A mass of 2 kg is moving with a velocity of 5 m/s. What is its kinetic energy?
Options:
A) 10 J
B) 20 J
C) 25 J
D) 50 J
Kinetic Energy Calculation | Work, Energy, and Energy Resources
- 36
The unit of electrical power is
Options:
A) Ohm
B) Watt
C) Ampere
D) Volt
Units of Electrical Power | Electric Current and Circuits
- 37
Which of the following is a non-renewable source of energy?
Options:
A) Solar energy
B) Wind energy
C) Geothermal energy
D) Fossil fuels
Renewable vs Non-renewable Energy | Energy Resources
- 38
A body of mass 50 kg is moving with a velocity of 10 m/s. What is the momentum of the body?
Options:
A) 500 kg m/s
B) 1000 kg m/s
C) 200 kg m/s
D) 50 kg m/s
Momentum Calculation | Momentum and Impulse
- 39
The power of an electric heater is 2000 W and it operates for 3 hours. How much energy does it consume?
Options:
A) 6000 J
B) 72000 J
C) 180000 J
D) 600000 J
Energy Consumption | Electric Power and Energy
- 40
A current of 3 A flows through a resistor of resistance 5 Ω. What is the voltage across the resistor?
Options:
A) 15 V
B) 5 V
C) 10 V
D) 20 V
Ohm’s Law | Electric Current and Circuits
- 41
If the frequency of a wave is 100 Hz and its wavelength is 2 m, what is its speed?
Options:
A) 50 m/s
B) 200 m/s
C) 100 m/s
D) 25 m/s
Wave Speed Calculation | Wave Properties
- 42
What is the work done in lifting a 10 kg mass to a height of 5 m? (Take g = 10 m/s²)
Options:
A) 50 J
B) 100 J
C) 150 J
D) 200 J
Work Done Against Gravity | Work, Energy, and Energy Resources
- 43
The force of gravity on the surface of Mars is approximately 4 m/s². If a 10 kg object is on Mars, what is its weight?
Options:
A) 4 N
B) 10 N
C) 40 N
D) 100 N
Weight Calculation | Universal Gravitation
- 44
What is the potential difference across a resistor of 8 Ω if the current through it is 2 A?
Options:
A) 4 V
B) 16 V
C) 2 V
D) 8 V
Voltage and Resistance | Electric Current and Circuits
- 45
- 46
What is the force required to accelerate a 5 kg object at a rate of 2 m/s²?
Options:
A) 10 N
B) 5 N
C) 7 N
D) 2 N
Newton’s Second Law of Motion | Force and Motion
- 47
If a car travels a distance of 100 km in 2 hours, what is its average speed in km/h?
Options:
A) 50 km/h
B) 40 km/h
C) 60 km/h
D) 100 km/h
Average Speed Calculation | One-Dimensional Kinematics
48
The pressure of a gas is 1.5 atm and its volume is 2 L. What will be the volume of the gas if the pressure is increased to 3 atm, assuming constant temperature?
Options:
A) 1 L
B) 2 L
C) 3 L
D) 0.5 L
Gas Laws | Thermodynamics
49
A stone is thrown vertically upwards with an initial velocity of 20 m/s. How high will it rise before coming to a stop? (Take g = 10 m/s²)
Options:
A) 10 m
B) 20 m
C) 30 m
D) 40 m
Maximum Height Calculation | One-Dimensional Kinematics
50
What is the work done in moving an electron through a potential difference of 12 V? (Charge of an electron = 1.6 × 10⁻¹⁹ C)
Options:
A) 1.92 × 10⁻¹⁸ J
B) 1.92 × 10⁻¹⁹ J
C) 1.92 × 10⁻²⁰ J
D) 1.92 × 10⁻²¹ J
Work Done in Moving Charges | Electric Potential and Electric Field
Here are the answers for the provided questions:
61
If a substance is radioactive, a notebook can shield the student from:
Options:
A) Gamma rays
B) Neutrons
C) Alpha particles
D) Energetic beta ray
Answer: C) Alpha particles
62
The coefficient of kinetic friction between the body and the inclined plane is:
Options:
A) cot θ
B) cos θ
C) tan θ
D) sin θ
Answer: C) tan θ
63
The pressure at a depth of 80 m below the sea surface is:
Options:
A) 9.25 × 10⁵ Pa
B) 8.24 × 10⁵ Pa
C) 7.23 × 10⁵ Pa
D) 8.34 × 10⁹ Pa
Answer: B) 8.24 × 10⁵ Pa
64
The final temperature of the dry ice after 6000 J of heat is delivered:
Options:
A) 142.9°C
B) 63.6°C
C) 43.0°C
D) -78.5°C
Answer: C) 43.0°C
65
Time for the rate of decay to reduce to 2 decays per second:
Options:
A) 80 days
B) 64 days
C) 48 days
D) 32 days
Answer: B) 64 days
66
Emerging rays of light through a triangular prism, arranged in order of decreasing angle of deviation:
Options:
A) Red, orange, yellow, green
B) Blue, green, orange, yellow
C) Red, green, yellow, blue
D) Blue, green, yellow, orange
Answer: B) Blue, green, orange, yellow
67
The velocity of the particle t seconds after its release:
Options:
A) qEt/m
B) qEt²/2m
C) mqt²/2E
D) mqt/2E
Answer: A) qEt/m
68
The average force moving the car:
Options:
A) 2000 N
B) 1600 N
C) 1200 N
D) 800 N
Answer: B) 1600 N
69
Total energy of the body at a height of 5 m:
Options:
A) 80 J
B) 100 J
C) 116 J
D) 180 J
Answer: C) 116 J
70
Distance traveled by the airplane while accelerating:
Options:
A) 4.4 km
B) 1.1 km
C) 2.3 km
D) 1.0 km
Answer: C) 2.3 km
81
Which of the following is not true about a chemical cell?
Options:
A) In primary cells the process through which current is generated is irreversible
B) Secondary cells can be recharged after they run down by passing a current into the cell in the reverse direction
C) Positive ions are attracted to the positive electrode where they become neutralized by acquiring electrons.
D) Primary cells can be recharged
Answer: D) Primary cells can be recharged
82
Which of the following phenomena cannot be explained by the molecular theory of matter?
Options:
A) evaporation
B) expansion
C) conduction
D) radiation
Answer: D) radiation
83
The most likely measurement of length using a vernier caliper:
Options:
A) 3.0 cm
B) 3.3 cm
C) 3.33 cm
D) 3.333 cm
Answer: C) 3.33 cm
84
Density of the resulting mixture:
Options:
A) 780 g/cm³
B) 0.78 g/cm³
C) 30 g/cm³
D) 10 g/cm³
Answer: B) 0.78 g/cm³
85
Instantaneous velocity of the particle at t = 2.5 s:
Options:
A) 12 m/s
B) 6 m/s
C) 0 m/s
D) 10 m/s
Answer: C) 0 m/s
86
Distance jumped in the horizontal direction:
Options:
A) 0.384 m
B) 7.94 m
C) 8.45 m
D) 0 m
Answer: B) 7.94 m
87
Period of oscillation for the spring:
Options:
A) 0.33 s
B) 100 s
C) 200 s
D) 280 s
Answer: A) 0.33 s
88
Speed of the boat to land the package in the boat:
Options:
A) 17 m/s
B) 14 m/s
C) 1.7 m/s
D) 4.9 m/s
Answer: A) 17 m/s
89
Tension in the string:
Options:
A) 14 N
B) 80 N
C) 170 N
D) 24 N
Answer: C) 170 N
90
Angular velocity of the wheels:
Options:
A) 16.67 rad/s
B) 47.6 rad/s
C) 21 rad/s
D) 171.4 rad/s
Answer: B) 47.6 rad/s
91
Volume of the bubble at the surface:
Options:
A) 124 cm³
B) 319 cm³
C) 60 cm³
D) 104 cm³
Answer: B) 319 cm³
92
Work performed by the gas:
Options:
A) 6.4 × 10⁵ J
B) 3.2 × 10⁵ J
C) 1.6 × 10⁵ J
D) 0.4 × 10⁵ J
Answer: B) 3.2 × 10⁵ J
93
Highly polished silvery surfaces are:
Options:
A) Poor absorbers but good emitters of radiation
B) Good absorbers and good emitters of radiation
C) Poor emitters but good reflectors of radiation
D) Poor emitters and poor reflectors of radiation
Answer: C) Poor emitters but good reflectors of radiation
94
Speed of propagation of the wave and the tension in the string:
Options:
A) 64 m/s
B) 340 m/s
C) 32 m/s
D) 128 m/s
Answer: D) 128 m/s
95
Total power output of the source:
Options:
A) 112 W
B) 5.6 W
C) 15 W
D) 30 W
Answer: B) 5.6 W
96
The superposition of two or more waves to produce a maximum or zero effect at a point is known as:
Options:
A) reflection
B) refraction
C) diffraction
D) interference
Answer: D) interference
97
The acceleration due to gravity:
Options:
A) Increases with increasing altitude
B) decreases with increasing altitude
C) increases with increase in the square of the altitude
D) is not affected by the altitude
Answer: B) decreases with increasing altitude
98
Which of the following statements is not true?
Options:
A) Electric field intensity is force per unit charge
B) Electric potential is a vector
C) The S. I unit of electric field strength is N/C
D) electric field intensity is equal to potential gradient
Answer: B) Electric potential is a vector
99
Which of the following about electrolysis is false?
Options:
A) Liquid that conduct electricity and are split up chemically by the current are electrolyzed
B) The current is brought into the electrolyte by the anode
C) The current is taken away from the electrolyte by the cathode
D) The container which holds the electrolyte and the electrode is the voltmeter
Answer: D) The container which holds the electrolyte and the electrode is the voltmeter
100
Which of the following is not true about the properties of x-rays?
Options:
A) They are not deflected by magnetic or electric field
B) They ionize a gas, making it a conductor
C) They are massive
D) They have high penetrating power
Answer: C) They are massive
101:
A transformer is connected to a 240 V supply with a secondary voltage of 960 V. What is the ratio of the number of turns in the primary coil to the secondary coil?
A) 1:4
B) 1:2
C) 4:1
D) 2:1
102:
Which statement is not true about an object projected upwards at an angle θ?
A) The velocity is maximum at the maximum height.
B) The acceleration along the horizontal direction is zero.
C) The maximum range (R_max) for an object moving with speed u is given by u2g\frac{u^2}{g}gu2 .
D) The time it takes to get to the maximum height is equal to the time it takes to come back to the point of projection.
103:
For three coplanar non-parallel forces in equilibrium, which statement is correct?
A) They can be represented in magnitude and direction by the three sides of a triangle taken in order.
B) The lines of action meet at a point.
C) The magnitude of any one force equals the magnitude of the resultant of the other two forces.
D) Any one force is the equivalent of the other two.
104:
Which statement is not TRUE about a body performing simple harmonic motion?
A) The linear speed is the product of the angular speed and the radius or amplitude.
B) The linear acceleration is the product of the square of the angular speed and the displacement.
C) Frequency is the number of complete revolutions per second made by a vibrating body.
D) The SI unit of amplitude is Hertz (Hz).
105:
frac{m}{F}g=Fm
106:
The force with which an object is attracted to the earth is called:
A) Mass
B) Weight
C) Gravity
D) Upthrust
E) Thrust
107:
108:
A body is projected upwards with an initial velocity of 44 m/s. If the acceleration due to gravity is -4 m/s² and the time of flight is 10 seconds, what is the final velocity?
A) -4 m/s
B) 4 m/s
C) 44 m/s
D) 84 m/s
109:
A 50 kg weight is lifted through a height of 10 meters in 5 seconds. What is the power expended?
A) 250 W
B) 500 W
C) 750 W
D) 1000 W
E) 1250 W
110:
A machine has a velocity ratio of 5 and is used to overcome a weight of 200 kg with an effort of 50 kg. What is the efficiency of the machine?
A) 50%
B) 60%
C) 70%
D) 80%
E) 90%
111:
An electric field intensity EEE is given by E=FqE = \frac{F}{q}E=qF . If the force FFF is 4 N and the charge qqq is 0.2 C, what is the electric field intensity?
A) 4 N/C
B) 8 N/C
C) 10 N/C
D) 12 N/C
E) 20 N/C
112:
The resistance of a wire depends on:
A) Length
B) Cross-sectional area
C) Material
D) Temperature
E) All of the above
113:
Which of these is not contained in a dry cell?
A) Carbon rod
B) Zinc casing
C) Electrolyte
D) Graphite
E) Copper rod
114:
If the period of a pendulum is 1.5 seconds and the length is 0.4 meters, what is the new period when the length is increased to 0.6 meters?
A) 1.00 s
B) 1.25 s
C) 1.50 s
D) 1.75 s
E) 2.00 s
115:
Which device converts sound energy into electrical energy?
A) Speaker
B) Amplifier
C) Microphone
D) Headphone
E) Transducer
116:
If a radio wave has a frequency of 800 kHz, what is its wavelength?
A) 375.0 m
B) 400.0 m
C) 425.0 m
D) 450.0 m
E) 500.0 m
117:
Which of these is not a fundamental SI unit?
A) Meter
B) Kilogram
C) Second
D) Ampere
E) Radian
118:
The center of gravity of two masses 40g and 60g is:
A) 40 cm from the lighter mass
B) 50 cm from the lighter mass
C) 40 cm from the heavier mass
D) 60 cm from the heavier mass
E) 50 cm from the heavier mass
119:
A sonar device emits sound waves with a velocity of 1500 m/s and receives the echo after 1 second. What is the depth of the sea?
A) 0.75 km
B) 1.0 km
C) 1.5 km
D) 2.0 km
E) 2.5 km
120:
121:
Which mode of heat transfer does not require a material medium?
A) Conduction
B) Radiation
C) Convection
D) Induction
E) Convection
122:
The pressure at a height of 20 km in the atmosphere is approximately:
A) 100 mmHg
B) 150 mmHg
C) 190 mmHg
D) 200 mmHg
E) 250 mmHg
123:
Which of these involves a change of state?
A) Condensation
B) Evaporation
C) Boiling
D) Sublimation
E) All of the above
124:
Which instrument produces a pure tone?
A) Tuning fork
B) Drum
C) Flute
D) Guitar
E) Trumpet
125:
The most suitable focal length for a microscope objective is:
A) +1 cm
B) +2 cm
C) +3 cm
D) +5 cm
E) +10 cm
126:
127:
For frequencies ratio of 4:1, the mass ratio is:
A) 1:2
B) 2:1
C) 1:4
D) 4:1
E) 1:8
128:
If a 200 W refrigerator runs for 20 days, what is the cost of operating it at ₦5 per kWh?
A) ₦400.00
B) ₦450.00
C) ₦480.00
D) ₦500.00
E) ₦550.00
129
130:
A cylindrical lens with focal length fff of 5 cm is placed between two glass prisms. The total focal length of the system is:
A) 2 cm
B) 5 cm
C) 10 cm
D) 15 cm
E) 20 cm
131:
Which law states that the current through a conductor between two points is directly proportional to the voltage across the two points?
A) Ohm’s Law
B) Faraday’s Law
C) Kirchhoff’s Law
D) Newton’s Law
E) Ampere’s Law
132:
The angle of deviation for a prism with an angle of 60 degrees and a refractive index of 1.5 is:
A) 30 degrees
B) 45 degrees
C) 60 degrees
D) 75 degrees
E) 90 degrees
133:
What is the unit of electrical resistance?
A) Volt
B) Ampere
C) Ohm
D) Watt
E) Farad
134:
The potential difference between two points in an electric field is 12 V, and the work done is 24 J. What is the charge?
A) 1 C
B) 2 C
C) 4 C
D) 6 C
E) 8 C
135:
Which of these is a non-renewable energy source?
A) Solar power
B) Wind power
C) Coal
D) Hydropower
E) Biomass
136:
137:
The principle of conservation of energy states that:
A) Energy can be created and destroyed
B) Energy can be converted from one form to another
C) Energy can only be converted from one form to another
D) Energy is always lost in conversions
E) Energy is always constant in a closed system
138:
A satellite in orbit around the Earth is in:
A) Freefall
B) Uniform circular motion
C) Uniform linear motion
D) Non-uniform circular motion
E) Harmonic motion
139:
The SI unit of work is:
A) Joule
B) Watt
C) Newton
D) Pascal
E) Volt
140:
The critical angle for a material is defined as:
A) The angle at which total internal reflection occurs
B) The angle of incidence at which light is refracted
C) The angle of reflection in a concave mirror
D) The angle of deviation in a prism
E) The angle between the normal and the incident ray
141:
The force required to keep a body moving in a circular path is:
A) Centripetal force
B) Gravitational force
C) Frictional force
D) Tension
E) Magnetic force
142:
The Doppler effect is observed when:
A) An object is at rest and the observer is moving
B) The source and observer are moving towards each other
C) The source is stationary and the observer is moving away
D) Both source and observer are moving away from each other
E) The source and observer are stationary
143:
The unit of capacitance is:
A) Farad
B) Henry
C) Ohm
D) Joule
E) Watt
144:
145:
The speed of sound in air is approximately:
A) 300 m/s
B) 340 m/s
C) 360 m/s
D) 400 m/s
E) 500 m/s
146:
In a nuclear reaction, the loss of mass is converted into:
A) Mechanical energy
B) Gravitational energy
C) Thermal energy
D) Chemical energy
E) Nuclear energy
147:
The SI unit of power is:
A) Watt
B) Joule
C) Newton
D) Volt
E) Ampere
148:
A black body is an ideal emitter and absorber of:
A) Light
B) Sound
C) Heat
D) Electric charge
E) Magnetic fields
149:
The frequency of a wave is the:
A) Number of oscillations per unit time
B) Distance between two consecutive crests
C) Speed of the wave
D) Rate of energy transfer
E) Maximum displacement from equilibrium
150:
The first law of thermodynamics is also known as:
A) Law of Conservation of Energy
B) Law of Entropy
C) Law of Equal Temperatures
D) Law of Heat Exchange
E) Law of Energy Dissipation
151:
In the diagram above, P, Q and R are vectors. Which of the following options gives the correct relationship between the vectors?
A) P=R−QP = R – QP=R−Q
B) P=R+QP = R + QP=R+Q
C) P=Q−RP = Q – RP=Q−R
D) P+R+Q=0P + R + Q = 0P+R+Q=0
152:
If M and R are the mass and radius of the Earth respectively and G is the universal gravitational constant, the Earth’s gravitational potential at an altitude H above the ground level is:
A) −GMH-\frac{GM}{H}−HGM
B) −GMR+H-\frac{GM}{R+H}−R+HGM
C) −GM2H-\frac{GM}{2H}−2HGM
D) −GM(R−H)-GM(R-H)−GM(R−H)
153:
The ice and steam points of a thermometer are 20mm and 100mm respectively. A temperature of 75°C corresponds to Y mm on the thermometer. What is Y?
A) 100mm
B) 70mm
C) 80mm
D) 60mm
154:
An electric kettle with negligible heat capacity is rated at 2000 W. If 2.0 kg of water is put in it, how long will it take for the temperature of the water to rise from 20°C to 100°C? [Specific heat capacity of water = 4200 J/kg·K]
A) 336s
B) 420s
C) 168s
D) 84s
155:
A quantity of ice at -10°C is heated until the temperature of the heating vessel is 90°C. Which of the following constants is NOT required to determine the quantity of heat supplied to the vessel?
A) Specific latent heat of vaporization
B) Specific heat capacity of ice
C) Specific latent heat of fusion
D) Specific heat capacity of water
156:
The scent from a jar of perfume opened in one corner of a room is picked up in another part of the room. The perfume moves through the air molecules by:
A) Evaporation
B) Osmosis
C) Diffusion
D) Convection
157:
What is the dimension of pressure?
A) ML−1T−2ML^{-1}T^{-2}ML−1T−2
B) MLT−2MLT^{-2}MLT−2
C) ML2T−3ML^2T^{-3}ML2T−3
D) ML−3ML^{-3}ML−3
158:
Calculate the length of a displaced pendulum bob that passes its lowest point twice every second. [g = 10 m/s²]
A) 1.000m
B) 0.253m
C) 0.450m
D) 0.58m
159:
When a ball rolls on a smooth level ground, the motion of its center is:
A) Translational
B) Random
C) Oscillatory
D) Rotational
160:
A vehicle of mass mmm is driven by an engine of power PPP from rest. Find the minimum time it will take to acquire a speed vvv.
A) mv2P\frac{mv^2}{P}Pmv2
B) mv22P\frac{mv^2}{2P}2Pmv2
C) mvP\frac{mv}{P}Pmv
D) mv2P\frac{mv^2}{P}Pmv2
161:
A box of mass 40kg is being dragged along the floor by a rope inclined at 60° to the horizontal. The frictional force between the box and the floor is 100N and the tension on the rope is 300N. How much work is done in dragging the box through a distance of 4m?
A) 680J
B) 200J
C) 100J
D) 400J
162:
A body is projected from the Earth’s surface with the hope of letting it escape from the Earth’s gravitational field. What is the minimum escape velocity? [Earth’s radius = 6.4×1036.4 \times 10^36.4×103 km, g=10g = 10g=10 m/s²]
A) 11.3 km/s
B) 13.3 km/s
C) 12.3 km/s
D) 14.3 km/s
163:
A uniform rod PQ of mass 2kg and length of 1m is pivoted at the end P. If a load of 14N is placed on it at the center, find the force that should be applied vertically upwards at Q to maintain the rod in equilibrium horizontally.
A) 7N
B) 28N
C) 68N
D) 17N
164:
The energy contained in a wire when it is extended by 0.02 m by a force of 500N is:
A) 10410^4104 J
B) 10310^3103 J
C) 10J
D) 5J
165:
What is the acceleration due to gravity ‘g’ on the moon, if ggg is 10 m/s² on the Earth?
A) 0.74 m/s²
B) 0.1 m/s²
C) 10.0 m/s²
D) 1.67 m/s²
166:
A 5 kg block is released from rest on a smooth plane inclined at an angle of 30° to the horizontal. What is the acceleration down the plane? [g = 10 m/s²]
A) 5.0 m/s²
B) 8.7 m/s²
C) 25.0 m/s²
D) 5.8 m/s²
167:
A rectangular metal block of volume 10−610^{-6}10−6 m³ at 273K is heated to 573K. If its coefficient of linear expansion is 1.2×10−51.2 \times 10^{-5}1.2×10−5 K⁻¹, the percentage change of its volume is:
A) 1.5%
B) 1.1%
C) 0.1%
D) 0.4%
168:
A temperature scale has a lower fixed point of 40mm and an upper fixed point of 200mm. What is the reading on this scale when a thermometer reads 60°C?
A) 136.0mm
B) 33.3mm
C) 96.0mm
D) 36.0mm
169:
A 500 kg car was initially at rest and traveled with an acceleration of 5 m/s². What is its kinetic energy after 4s?
A) 2.5×1032.5 \times 10^32.5×103 J
B) 10510^5105 J
C) 5×1035 \times 10^35×103 J
D) 5×1055 \times 10^55×105 J
170:
The temperature at which the water vapor in the air saturates the air and begins to condense is:
A) Melting point
B) Triple point
C) Dew point
D) Melting point
171:
The period of a simple pendulum will increase by what factor if its inextensible length is increased by a factor of four?
A) 2π2\pi2π
B) 4
C) 2
D) 14
172:
The speed of light in air is 3×1083 \times 10^83×108 m/s. If the refractive index of light from air to water is 43\frac{4}{3}34 , calculate the speed of light in water.
A) 2.25×1082.25 \times 10^82.25×108 m/s
B) 2.25×1082.25 \times 10^82.25×108 m/s
C) 4.00×1084.00 \times 10^84.00×108 m/s
D) 4.33×1084.33 \times 10^84.33×108 m/s
173:
It is known that an atomic nucleus comprises of positively charged protons. Which of the following also exists in the nucleus?
A) A beta particle
B) An alpha particle
C) A neutron
D) An electron
174:
The silver wall of a vacuum flask prevents heat loss due to:
A) Conduction
B) Convection
C) Radiation
D) Diffraction
175:
The electromagnetic waves that are sensitive to temperature changes are:
A) Ultra-violet rays
B) Gamma-rays
C) Infra-red rays
D) X-rays
176:
Under constant tension and constant mass per unit length, the note produced by a plucked string is 500Hz when the length of the string is 0.90m. At what length is the frequency 150Hz?
A) 6m
B) 3m
C) 5m
D) 4m
177:
Two bodies P and Q are projected on the same horizontal plane, with the same initial speed but at different angles of 30° and 60° respectively to the horizontal. Neglecting air resistance, what is the ratio of the range of P to that of Q?
A) 1:1
B) 1:3
C) 3:1
D) 1:2
178:
179:
The ice and steam points of a thermometer are 20mm and 100mm respectively. A temperature of 75°C corresponds to Y mm on the thermometer. What is Y?
A) 100mm
B) 70mm
C) 80mm
D) 60mm
180:
An electric kettle with negligible heat capacity is rated at 2000W. If 2.0 kg of water is put in it, how long will it take for the temperature of the water to rise from 20°C to 100°C? [Specific heat capacity of water = 4200 J/kg·K]
A) 336s
B) 420s
C) 168s
D) 84s
181:
A quantity of ice at -10°C is heated until the temperature of the heating vessel is 90°C. Which of the following constants is NOT required to determine the quantity of heat supplied to the vessel?
A) Specific latent heat of vaporization
B) Specific heat capacity of ice
C) Specific latent heat of fusion
D) Specific heat capacity of water
182:
The scent from a jar of perfume opened in one corner of a room is picked up in another part of the room. The perfume moves through the air molecules by:
A) Evaporation
B) Osmosis
C) Diffusion
D) Convection
183:
A convex lens of focal length 10.0cm is used to form a real image which is half the size of the object. How far from the object is the image?
A) 45cm
B) 30cm
C) 15cm
D) 20cm
184:
A diverging lens of focal length 20cm forms an image half of the size of the object. What is the object distance?
A) 11.11cm
B) 100cm
C) 60cm
D) 8.71cm
185:
An object of height 3.00cm is placed 10cm in front of a biconvex lens of focal length 15cm. The image of the object is:
A) Real and 3.00cm tall
B) Virtual and 3.00cm tall
C) Virtual and 9.00cm tall
D) Real and 9.00cm tall
186:
The most suitable type of mirror used for the construction of a searchlight is the:
A) Concave mirror
B) Spherical mirror
C) Convex mirror
D) Parabolic mirror
187:
Light waves and ripples of water are similar because both:
A) are longitudinal waves
B) can be diffracted and refracted
C) have the same velocity
D) have the same frequency
188:
A body accelerates uniformly from rest at 6 m/s² for 8 seconds and then decreases uniformly to rest in the next 5 seconds. The magnitude of the deceleration is:
A) 9.6 m/s²
B) 48 m/s²
C) 24.0 m/s²
D) 39.4 m/s²
189
190:
A 70kg man ascends a flight of stairs of height 4 m in 7s. The power expended by the man is:
A) 40 W
B) 100 W
C) 280 W
D) 400 W
191:
Which of the following statements is not true?
A) As the slope of an inclined plane increases, the velocity ratio decreases
B) The efficiency of an inclined plane decreases as the slope increases
C) The effort required to push a given load up an inclined plane increases as the slope increases
D) The mechanical advantage of a smooth inclined plane depends on the ratio of the length to the height of the plane
192:
In the diagram above, P, Q and R are vectors. Which of the following options gives the correct relationship between the vectors?
A) P=R−QP = R – QP=R−Q
B) P=R+QP = R + QP=R+Q
C) P=Q−RP = Q – RP=Q−R
D) P+R+Q=0P + R + Q = 0P+R+Q=0