Physics JAMB Past Questions and Answers – Most Repeated

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Physics is a crucial and important subject for JAMB candidates, and practicing past questions is one of the best ways to prepare for the examination. This blog provides most repeated Physics JAMB past questions and answers, divided into three sections for easy revision: By going through these questions, you can familiarize themselves with the JAMB question pattern, improve problem-solving skills, and increase confidence before the exam.

Section 1: Physics JAMB Past Questions 1–20

1. The unit of force in the SI system is:
a) Joule
b) Newton
c) Pascal
d) Watt
Answer: b) Newton

2. The acceleration due to gravity on Earth is approximately:
a) 9.8 m/s²
b) 10 m/s²
c) 9 m/s²
d) 8.8 m/s²
Answer: a) 9.8 m/s²

3. A body moving with uniform velocity has:
a) Constant speed and changing direction
b) Constant speed and constant direction
c) Changing speed and constant direction
d) Changing speed and direction
Answer: b) Constant speed and constant direction

4. The formula for kinetic energy is:
a) KE = ½ mv²
b) KE = mv²
c) KE = mg
d) KE = mgh
Answer: a) KE = ½ mv²

5. The instrument used to measure electric current is:
a) Voltmeter
b) Ammeter
c) Ohmmeter
d) Galvanometer
Answer: b) Ammeter

6. The frequency of a wave is:
a) Number of waves per second
b) Wavelength divided by speed
c) Speed divided by wavelength
d) Amplitude × Time
Answer: a) Number of waves per second

7. Which of the following is a scalar quantity?
a) Force
b) Velocity
c) Speed
d) Acceleration
Answer: c) Speed

8. The pressure of a gas is directly proportional to:
a) Volume at constant temperature
b) Temperature at constant volume
c) Mass at constant volume
d) Density at constant temperature
Answer: b) Temperature at constant volume

9. The unit of electric charge is:
a) Coulomb
b) Ampere
c) Volt
d) Ohm
Answer: a) Coulomb

10. The resistance of a conductor depends on:
a) Length, cross-sectional area, and material
b) Temperature only
c) Voltage applied
d) Current only
Answer: a) Length, cross-sectional area, and material

11. The work done is zero when:
a) Force is parallel to displacement
b) Force is perpendicular to displacement
c) Force is opposite displacement
d) Force is applied at an angle
Answer: b) Force is perpendicular to displacement

12. The momentum of a body is given by:
a) m × v
b) ½ mv²
c) m × a
d) m × g
Answer: a) m × v

13. The unit of energy in SI is:
a) Newton
b) Joule
c) Watt
d) Pascal
Answer: b) Joule

14. A body is in equilibrium when:
a) Net force is zero
b) Net force is maximum
c) Net acceleration is zero
d) Net torque is maximum
Answer: a) Net force is zero

15. Ohm’s law states that:
a) V = I × R
b) V = I / R
c) R = I / V
d) P = I × V
Answer: a) V = I × R

16. The speed of light in vacuum is approximately:
a) 3 × 10⁸ m/s
b) 3 × 10⁶ m/s
c) 3 × 10⁵ m/s
d) 3 × 10⁷ m/s
Answer: a) 3 × 10⁸ m/s

17. The device used to measure potential difference is:
a) Voltmeter
b) Ammeter
c) Galvanometer
d) Ohmmeter
Answer: a) Voltmeter

18. The density of a substance is defined as:
a) Mass × Volume
b) Mass / Volume
c) Volume / Mass
d) Mass × Gravity
Answer: b) Mass / Volume

19. The acceleration of a freely falling body is:
a) g
b) 2g
c) ½ g
d) g²
Answer: a) g

20. The unit of frequency is:
a) Second
b) Hertz
c) Joule
d) Watt
Answer: b) Hertz

Section 2: Physics JAMB Past Questions 21–40

Most repeated Physics JAMB Past Questions and Answers:

21. The law of reflection states that:
a) Angle of incidence = Angle of reflection
b) Angle of incidence > Angle of reflection
c) Angle of incidence < Angle of reflection
d) None of the above
Answer: a) Angle of incidence = Angle of reflection

22. The potential energy of a body at height h is:
a) mgh
b) ½ mv²
c) mg
d) m / h
Answer: a) mgh

23. The SI unit of power is:
a) Watt
b) Joule
c) Newton
d) Volt
Answer: a) Watt

24. The resultant of two equal and opposite forces is:
a) Zero
b) Double the force
c) Half the force
d) Equal to one force
Answer: a) Zero

25. The frequency of a pendulum depends on:
a) Length and gravity
b) Mass only
c) Gravity only
d) Mass and gravity
Answer: a) Length and gravity

26. The type of lens used to correct long-sightedness is:
a) Concave
b) Convex
c) Plano-convex
d) Plano-concave
Answer: b) Convex

27. The unit of resistivity is:
a) Ω·m
b) Ω
c) m²/Ω
d) V/A
Answer: a) Ω·m

28. The angle between displacement and force when no work is done is:
a) 90°
b) 0°
c) 45°
d) 180°
Answer: a) 90°

29. In an isothermal process:
a) Temperature is constant
b) Pressure is constant
c) Volume is constant
d) Energy is constant
Answer: a) Temperature is constant

30. The SI unit of electric current is:
a) Volt
b) Ampere
c) Coulomb
d) Ohm
Answer: b) Ampere

31. The relation between frequency (f), wavelength (λ), and velocity (v) of a wave is:
a) v = f × λ
b) v = f / λ
c) v = λ / f
d) v = f + λ
Answer: a) v = f × λ

32. Hooke’s law applies to:
a) Elastic materials
b) Inelastic materials
c) Liquids
d) Gases
Answer: a) Elastic materials

33. The SI unit of pressure is:
a) Pascal
b) Newton
c) Joule
d) Watt
Answer: a) Pascal

34. The device used to measure small current is:
a) Galvanometer
b) Ammeter
c) Voltmeter
d) Ohmmeter
Answer: a) Galvanometer

35. The rate of change of velocity is:
a) Acceleration
b) Speed
c) Force
d) Momentum
Answer: a) Acceleration

36. Which of the following is a vector quantity?
a) Speed
b) Displacement
c) Time
d) Mass
Answer: b) Displacement

37. The force of attraction between two masses is given by:
a) F = G m₁ m₂ / r²
b) F = m × a
c) F = mg
d) F = ½ mv²
Answer: a) F = G m₁ m₂ / r²

38. The unit of work is:
a) Joule
b) Watt
c) Newton
d) Pascal
Answer: a) Joule

39. The phenomenon of splitting of white light into its constituent colors is called:
a) Reflection
b) Refraction
c) Dispersion
d) Diffraction
Answer: c) Dispersion

40. The formula for gravitational potential energy is:
a) U = mgh
b) U = ½ mv²
c) U = mg
d) U = mv²
Answer: a) U = mgh

Section 3: Questions 41–60

Most repeated Physics JAMB Past Questions and Answers:

51. The SI unit of magnetic flux is:
a) Tesla
b) Weber
c) Ampere
d) Henry
Answer: b) Weber

42. The heat gained or lost by a body is given by:
a) Q = mcΔT
b) Q = mgh
c) Q = ½ mv²
d) Q = mg
Answer: a) Q = mcΔT

43. The type of energy possessed by a stretched spring is:
a) Kinetic energy
b) Elastic potential energy
c) Gravitational potential energy
d) Thermal energy
Answer: b) Elastic potential energy

44. A body floats in water when its density is:
a) Greater than water
b) Less than water
c) Equal to water
d) Twice that of water
Answer: b) Less than water

45. The SI unit of capacitance is:
a) Henry
b) Farad
c) Coulomb
d) Ohm
Answer: b) Farad

46. The angle of refraction when light passes from air to water is determined by:
a) Snell’s law
b) Hooke’s law
c) Newton’s law
d) Ohm’s law
Answer: a) Snell’s law

47. The work done by a force F moving a body through displacement d at angle θ is:
a) W = F × d × cosθ
b) W = F × d × sinθ
c) W = F × d / cosθ
d) W = F × d²
Answer: a) W = F × d × cosθ

48. The SI unit of momentum is:
a) kg·m/s
b) N·m
c) J
d) kg·m²/s²
Answer: a) kg·m/s

49. The frequency of a sound wave determines its:
a) Loudness
b) Pitch
c) Speed
d) Amplitude
Answer: b) Pitch

50. The SI unit of electric potential difference is:
a) Ampere
b) Volt
c) Ohm
d) Joule
Answer: b) Volt

51. A conductor allows:
a) Flow of electrons
b) Flow of neutrons
c) Flow of protons
d) No flow of charge
Answer: a) Flow of electrons

52. The phenomenon of bending of light around the edge of an obstacle is called:
a) Reflection
b) Refraction
c) Diffraction
d) Dispersion
Answer: c) Diffraction

53. The unit of electric power is:
a) Joule
b) Watt
c) Ampere
d) Volt
Answer: b) Watt

54. A body moves in a circular path with constant speed. Its acceleration is:
a) Zero
b) Tangential
c) Centripetal
d) Linear
Answer: c) Centripetal

55. The ratio of the speed of light in vacuum to the speed in a medium is:
a) Refractive index
b) Reflection coefficient
c) Critical angle
d) Diffraction angle
Answer: a) Refractive index

56. The internal energy of an ideal gas depends on:
a) Temperature only
b) Pressure only
c) Volume only
d) Mass only
Answer: a) Temperature only

57. The rate of doing work is called:
a) Energy
b) Power
c) Force
d) Torque
Answer: b) Power

58. The SI unit of torque is:
a) Newton
b) Joule
c) Newton-meter
d) Watt
Answer: c) Newton-meter

59. When a wave passes from a denser medium to a rarer medium, it:
a) Bends away from the normal
b) Bends towards the normal
c) Stops
d) Changes frequency
Answer: a) Bends away from the normal

60. The force that opposes motion between two surfaces in contact is:
a) Gravitational force
b) Frictional force
c) Tension force
d) Magnetic force
Answer: b) Frictional force

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