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Civil and Mechanical

J physics 23

Written by Admin September 7, 2025September 7, 2025

Jamb Physics 2023

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Question 1 of 40

1. Question

Which of the following is a type of wave that is both mechanical and longitudinal?

Water waves
Correct Incorrect Correct answer

Seismic waves
Correct Incorrect Correct answer

Sound waves
Correct Incorrect Correct answer

Light waves
Correct Incorrect Correct answer

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Question 2 of 40

2. Question

How much net work is required to accelerate a 1200 kg car from 10 ms^-1 to 15 ms^-1?

\(1.95 \times 10^5 \, j\)
Correct Incorrect Correct answer

\(1.35 \times 10^4 \, j\)
Correct Incorrect Correct answer

\(7.5 \times 10^4 \, j\)
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\(6.0 \times 10^4 \, j\)
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Question 3 of 40

3. Question

Which of the following is NOT a limitation of experimental measurements?

Systematic error
Correct Incorrect Correct answer

Instrument resolution
Correct Incorrect Correct answer

Random errors
Correct Incorrect Correct answer

Human error
Correct Incorrect Correct answer

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Question 4 of 40

4. Question

A lorry accelerates uniformly in a straight line with acceleration of 4ms^-1 and covers a distance of 250 m in a time interval of 10 s. How far will it travel in the next 10 s?

650
Correct Incorrect Correct answer

900
Correct Incorrect Correct answer

800
Correct Incorrect Correct answer

250
Correct Incorrect Correct answer

Correct

Incorrect
Question 5 of 40

5. Question

Which of the following is NOT an example of elementary modern physics?

Classical mechanics
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Quantum mechanics
Correct Incorrect Correct answer

Special relativity
Correct Incorrect Correct answer

Nuclear physics
Correct Incorrect Correct answer

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Question 6 of 40

6. Question

The pinhole camera works on

the principle of the reversibility of light
Correct Incorrect Correct answer

the principle of the rectilinear propagation of light
Correct Incorrect Correct answer

Huygen's principle
Correct Incorrect Correct answer

the principle of total internal reflection of light
Correct Incorrect Correct answer

Correct

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Question 7 of 40

7. Question

Rainbow formation is as a result of the combination of which of the following phenomena?
(i) Reflection
(ii) Dispersion
(iii) Total internal reflection
(iv) Refraction

(ii) and (iv) only
Correct Incorrect Correct answer

(i), (iii) and (iv) only
Correct Incorrect Correct answer

(ii), (iii) and (iv) only
Correct Incorrect Correct answer

(i), (ii) and (iv) only
Correct Incorrect Correct answer

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Question 8 of 40

8. Question

The sensitivity of a thermometer is

All of the above
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how quickly a temperature change can be detected
Correct Incorrect Correct answer

the difference between the maximum and the minimum temperature
Correct Incorrect Correct answer

the smallest temperature change that can be detected or measured
Correct Incorrect Correct answer

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Question 9 of 40

9. Question

The electrolyte used in the Nickel-Iron (NiFe) accumulator is

dilute tetraoxosulphate(VI) acid
Correct Incorrect Correct answer

barium chloride solution
Correct Incorrect Correct answer

potassium hydroxide solution
Correct Incorrect Correct answer

sodium hydroxide solution
Correct Incorrect Correct answer

Correct

Incorrect
Question 10 of 40

10. Question

Name the type of equilibrium for each position of the ball

A - unstable, B - neutral, C - stable
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A - stable, B - neutral, C - unstable
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A - stable, B - unstable, C - neutral
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A - unstable, B - stable, C - neutral
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Correct

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Question 11 of 40

11. Question

Which of the following liquids has the highest surface tension?

Soapy water
Correct Incorrect Correct answer

Water
Correct Incorrect Correct answer

Mercury
Correct Incorrect Correct answer

Oil
Correct Incorrect Correct answer

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Question 12 of 40

12. Question

An explosion occurs at an altitude of 312 m above the ground. If the air temperature is -10.00°C, how long does it take the sound to reach the ground?

[velocity of sound at 0 deg = 331 ms^-1

0.94s
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0.96s
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0.93s
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0.95s
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Correct

Incorrect
Question 13 of 40

13. Question

What is the name of the model of the atom that describes electrons as orbiting the nucleus in specific energy levels?

Bohr model
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Dalton model
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Rutherford model
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Thomson model
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Correct

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Question 14 of 40

14. Question

How much work is done against the gravitational force on a 3.0 kg object when it is carried from the ground floor to the roof of a building, a vertical climb of 240 m?

7.2 kJ
Correct Incorrect Correct answer

4.6 kJ
Correct Incorrect Correct answer

6.8 kJ
Correct Incorrect Correct answer

8.4 kJ
Correct Incorrect Correct answer

Correct

Incorrect
Question 15 of 40

15. Question

The surface temperature of a swimming pool on a warm day is 25°C and the temperature at the bottom is 15°C. If the swimming pool has a surface area of 620 m² and a depth of 1.5m. Find the rate at which energy is transferred by conduction from the surface to the bottom of the swimming pool.

[Thermal conductivity of water (k) = 0.6071 Wm^-1K^-1]

2.5kw
Correct Incorrect Correct answer

250kw
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300kw
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3.0kw
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Correct

Incorrect
Question 16 of 40

16. Question

Calculate the absolute pressure at the bottom of a lake at a depth of 32.8 m. Assume the density of the water is 1 x 10^-3 kgm^-3 and the air above is at a pressure of 101.3 kPa.

422.7
Correct Incorrect Correct answer

220.14
Correct Incorrect Correct answer

464.53
Correct Incorrect Correct answer

321.74
Correct Incorrect Correct answer

Correct

Incorrect
Question 17 of 40

17. Question

Which of the following is an example of a couple?

All of them
Correct Incorrect Correct answer

The forces that are applied to the handle of a screwdriver when you twist it.
Correct Incorrect Correct answer

The forces that are applied to a cross wench to loosen or tighten the lug nuts on a wheel of a car
Correct Incorrect Correct answer

The forces that are applied to the steering wheel of a car when you turn it
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Question 18 of 40

18. Question

A wire of radius 0.2 mm is extended by 0.5% of its length when supported by a load of 1.5 kg. Determine the Young's modulus for the material of the wire.

[Take g = 10 ms^-2]

2.4×10¹⁰(Nm^-2)
Correct Incorrect Correct answer

1.5×10¹⁰(Nm^-2)
Correct Incorrect Correct answer

2.4×10⁹(Nm^-2)
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1.3×10¹⁰(Nm^-2)
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Correct

Incorrect
Question 19 of 40

19. Question

Which of the following statements is correct about the angle of dip at various points on Earth?

The angle of dip is zero at the equator and 90 degrees at the magnetic poles
Correct Incorrect Correct answer

The angle of dip is greater at higher altitudes than at lower altitudes
Correct Incorrect Correct answer

The angle of dip is positive in the northern hemisphere and negative in the southern hemisphere
Correct Incorrect Correct answer

The angle of dip is constant at all points on Earth
Correct Incorrect Correct answer

Correct

Incorrect
Question 20 of 40

20. Question

The working of the beam balance is based on the principle of

moments
Correct Incorrect Correct answer

conservation of energy
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equivalence
Correct Incorrect Correct answer

floatation
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Correct

Incorrect
Question 21 of 40

21. Question

The property of wave shown in the diagram above is?

Diffraction
Correct Incorrect Correct answer

Refraction
Correct Incorrect Correct answer

Polarisation
Correct Incorrect Correct answer

Interference
Correct Incorrect Correct answer

Correct

Incorrect
Question 22 of 40

22. Question

A simple pendulum, has a period of 5.77 seconds. When the pendulum is shortened by 3 m, the period is 4.60 seconds. Calculate the new length of the pendulum

5.23 m
Correct Incorrect Correct answer

6.42 m
Correct Incorrect Correct answer

4.87 m
Correct Incorrect Correct answer

7.26 m
Correct Incorrect Correct answer

Correct

Incorrect
Question 23 of 40

23. Question

In an AC circuit, resonance occurs when the impedance of the circuit is:

Zero
Correct Incorrect Correct answer

Maximum
Correct Incorrect Correct answer

Equal to the capacitive reactance of the circuit
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Minimum
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Correct

Incorrect
Question 24 of 40

24. Question

A 400 N box is being pushed across a level floor at a constant speed by a force P of 100 N at an angle of 30.0° to the horizontal, as shown in the the diagram below. What is the coefficient of kinetic friction between the box and the floor?

0.19
Correct Incorrect Correct answer

0.24
Correct Incorrect Correct answer

0.4
Correct Incorrect Correct answer

0.22
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Correct

Incorrect
Question 25 of 40

25. Question

A man swung an object of mass 2 kg in a circular path with a rope 1.2 m long. If the object was swung at 120 rev/min, find the tension in the rope.

400
Correct Incorrect Correct answer

288
Correct Incorrect Correct answer

240
Correct Incorrect Correct answer

379
Correct Incorrect Correct answer

Correct

Incorrect
Question 26 of 40

26. Question

Light of wavelength 589 nm in vacuum passes through a piece of fused quartz of index of refraction n = 1.458. What is the frequency of the light in fused quartz?

[Speed of light c = 3 *10⁸ms^-1]

5.09×10¹⁵ Hz
Correct Incorrect Correct answer

5.09×10¹⁴ Hz
Correct Incorrect Correct answer

1.77×10¹⁵ Hz
Correct Incorrect Correct answer

1.77×10¹⁴ Hz
Correct Incorrect Correct answer

Correct

Incorrect
Question 27 of 40

27. Question

Which of the following thermometers measures temperature from the thermal radiation emitted by objects?

Pyrometer thermometer
Correct Incorrect Correct answer

Platinum resistance thermometer
Correct Incorrect Correct answer

Thermocouple thermometer
Correct Incorrect Correct answer

Constant pressure gas thermometer
Correct Incorrect Correct answer

Correct

Incorrect
Question 28 of 40

28. Question

A relative density bottle has a mass of 19 g when empty. When it is completely filled with water, its mass is 66 g. What will be its mass if completely filled with alcohol of relative density 0.8?

47 g
Correct Incorrect Correct answer

52.8 g
Correct Incorrect Correct answer

37.6 g
Correct Incorrect Correct answer

56.6
Correct Incorrect Correct answer

Correct

Incorrect
Question 29 of 40

29. Question

When a water droplet is placed on a freshly cut piece of wood, it spreads out to form a thin layer because the wood is

not at equilibrium with the water
Correct Incorrect Correct answer

cohesive to water
Correct Incorrect Correct answer

at equilibrium with the water
Correct Incorrect Correct answer

adhesive to water
Correct Incorrect Correct answer

Correct

Incorrect
Question 30 of 40

30. Question

An object is placed 35 cm away from a convex mirror with a focal length of magnitude 15 cm. What is the location of the image?

26.25 cm behind the mirror
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10.5 cm behind the mirror
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26.25 cm in front of the mirror
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10.5 cm in front of the mirror
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Question 31 of 40

31. Question

A step-down transformer is used on a 2.2 kV line to deliver 110 V. How many turns are on the primary windings if the secondary has 25 turns?

20
Correct Incorrect Correct answer

250
Correct Incorrect Correct answer

200
Correct Incorrect Correct answer

500
Correct Incorrect Correct answer

Correct

Incorrect
Question 32 of 40

32. Question

A positively charged particle is placed near a negatively charged particle. What is the direction of the electric force between the two particles?

The electric force is directed from the negative particle to the positive particle
Correct Incorrect Correct answer

The electric force is zero
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The direction of the electric force cannot be determined
Correct Incorrect Correct answer

The electric force is directed from the positive particle to the negative particle
Correct Incorrect Correct answer

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Incorrect
Question 33 of 40

33. Question

The number of holes in an intrinsic semiconductor

is not equal to the number of free electrons
Correct Incorrect Correct answer

is greater than the number of free electrons
Correct Incorrect Correct answer

is equal to the number of free electrons
Correct Incorrect Correct answer

is less than the number of free electrons
Correct Incorrect Correct answer

Correct

Incorrect
Question 34 of 40

34. Question

An open-tube mercury manometer is used to measure the pressure in a gas tank. When the atmospheric pressure is 101,325 Pa, what is the absolute pressure in Pa in the tank if the height of the mercury in the open tube is 25 cm higher

108,986 Pa
Correct Incorrect Correct answer

165,238 Pa
Correct Incorrect Correct answer

122,364 Pa
Correct Incorrect Correct answer

134,645 Pa
Correct Incorrect Correct answer

Correct

Incorrect
Question 35 of 40

35. Question

Which process is responsible for production of energy in stars?

Nuclear reaction
Correct Incorrect Correct answer

Nuclear fission
Correct Incorrect Correct answer

Nuclear fusion
Correct Incorrect Correct answer

Radioactive decay
Correct Incorrect Correct answer

Correct

Incorrect
Question 36 of 40

36. Question

In the diagram above, if the south poles of two magnets stroke a steel bar, the polarities at X and Y will respectively be

south and north
Correct Incorrect Correct answer

North and south
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north and north
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south and south
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Correct

Incorrect
Question 37 of 40

37. Question

The terminals of a battery of emf 24.0 V and internal resistance of 1.0 Ω is connected to an external resistor 5.0 Ω. Find the terminal p.d.

18.0V
Correct Incorrect Correct answer

12.0V
Correct Incorrect Correct answer

16.0V
Correct Incorrect Correct answer

20.0V
Correct Incorrect Correct answer

Correct

Incorrect
Question 38 of 40

38. Question

The branch of physics that deals with the motion of objects and the forces acting on them is called:

Electromagnetism
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Thermodynamics
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Mechanics
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Quantum mechanics
Correct Incorrect Correct answer

Correct

Incorrect
Question 39 of 40

39. Question

A charge of 4.6×10⁻⁵C is placed in an electric field of intensity 3.2×104 Vm⁻¹. What is the force acting on the electron?

1.5 N
Correct Incorrect Correct answer

3.7 N
Correct Incorrect Correct answer

4.2 N
Correct Incorrect Correct answer

2.5 N
Correct Incorrect Correct answer

Correct

Incorrect
Question 40 of 40

40. Question

Which of the following is a type of incandescent light source?

Fluorescent lamp
Correct Incorrect Correct answer

LED lamp
Correct Incorrect Correct answer

Tungsten filament lamp
Correct Incorrect Correct answer

Neon lamp
Correct Incorrect Correct answer

Correct

Incorrect

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