JAMB Physics questions

450 questions with answers and explanations. Tap an option to check yourself.

1. Question 421· Waves· JAMB

   Diffraction of a wave through a gap is most noticeable when the width of the gap is

   • Amuch smaller than the amplitude
   • Bmuch larger than the wavelength
   • Cabout the same as the wavelength
   • Dzero

   Show answer

   Answer: C. about the same as the wavelength

   Explanation and discussion

2. Question 422· Waves· JAMB

   A wave has an amplitude of 5 cm. What is the vertical distance between a crest and a trough?

   • A5 cm
   • B10 cm
   • C2.5 cm
   • D20 cm

   Show answer

   Answer: B. 10 cm

   Explanation and discussion

3. Question 423· Waves· JAMB

   

   The diagram shows a transverse wave. What is its wavelength?

   • A40 cm
   • B20 cm
   • C10 cm
   • D5 cm

   Show answer

   Answer: B. 20 cm

   Explanation and discussion

4. Question 424· Waves· JAMB

   The fact that light can be polarised shows that light is

   • Amade of particles only
   • Ba longitudinal wave
   • Ca transverse wave
   • Da sound wave

   Show answer

   Answer: C. a transverse wave

   Explanation and discussion

5. Question 425· Waves· JAMB

   When two waves meet in phase, they produce

   • Apolarisation
   • Bdestructive interference
   • Cdiffraction
   • Dconstructive interference

   Show answer

   Answer: D. constructive interference

   Explanation and discussion

6. Question 426· Waves· JAMB

   Which of the following is a transverse wave?

   • Asound in air
   • Blight
   • Ca compression wave in a spring
   • Dultrasound

   Show answer

   Answer: B. light

   Explanation and discussion

7. Question 427· Waves· JAMB

   Which of these electromagnetic waves has the longest wavelength?

   • Agamma rays
   • BX-rays
   • Cvisible light
   • Dradio waves

   Show answer

   Answer: D. radio waves

   Explanation and discussion

8. Question 428· Waves· JAMB

   A wave of frequency 500 Hz has a wavelength of 0.68 m. Find its speed.

   • A735 m/s
   • B340 m/s
   • C0.00136 m/s
   • D500 m/s

   Show answer

   Answer: B. 340 m/s

   Explanation and discussion

9. Question 429· Waves· JAMB

   Which of these can happen only to transverse waves?

   • Arefraction
   • Breflection
   • Cpolarisation
   • Ddiffraction

   Show answer

   Answer: C. polarisation

   Explanation and discussion

10. Question 430· Waves· JAMB

    

    The wave shown in the diagram has a frequency of 5 Hz. Find its speed.

    • A0.25 m/s
    • B2.0 m/s
    • C1.0 m/s
    • D100 m/s

    Show answer

    Answer: C. 1.0 m/s

    Explanation and discussion

11. Question 431· Waves· JAMB

    A steady interference pattern can only be produced by sources that are

    • Afar apart
    • Bvery loud
    • Ccoherent
    • Dmoving

    Show answer

    Answer: C. coherent

    Explanation and discussion

12. Question 432· Waves· JAMB

    A wave of frequency 50 Hz has a wavelength of 4 m. Its speed is:

    • A200 m/s
    • B54 m/s
    • C12.5 m/s
    • D0.08 m/s

    Show answer

    Answer: A. 200 m/s

    Explanation and discussion

13. Question 433· Waves· JAMB

    A wave of wavelength 0.5 m travels at 340 m/s. Find its frequency.

    • A340.5 Hz
    • B170 Hz
    • C680 Hz
    • D0.0015 Hz

    Show answer

    Answer: C. 680 Hz

    Explanation and discussion

14. Question 434· Waves· JAMB

    The distance between two successive compressions of a sound wave is

    • Athe frequency
    • Bhalf a wavelength
    • Cthe amplitude
    • Done wavelength

    Show answer

    Answer: D. one wavelength

    Explanation and discussion

15. Question 435· Waves· JAMB

    A wave has a period of 0.02 s. Find its frequency.

    • A20 Hz
    • B0.02 Hz
    • C50 Hz
    • D200 Hz

    Show answer

    Answer: C. 50 Hz

    Explanation and discussion

16. Question 436· Work, energy and power· JAMB

    A 0.5 kg ball is dropped from a height of 20 m. Find its speed just before it hits the ground. [g = 10 m/s²]

    • A10 m/s
    • B20 m/s
    • C200 m/s
    • D14 m/s

    Show answer

    Answer: B. 20 m/s

    Explanation and discussion

17. Question 437· Work, energy and power· JAMB

    A 2 kg body falls freely from a height of 20 m. Find its speed just before it hits the ground.

    • A20 m/s
    • B400 m/s
    • C10 m/s
    • D40 m/s

    Show answer

    Answer: A. 20 m/s

    Explanation and discussion

18. Question 438· Work, energy and power· JAMB

    A boy of mass 70 kg runs up a flight of stairs 3 m high in 7 s. Find his power.

    • A300 W
    • B30 W
    • C2100 W
    • D147 W

    Show answer

    Answer: A. 300 W

    Explanation and discussion

19. Question 439· Work, energy and power· JAMB

    A pump lifts 500 kg of water through a height of 12 m in 1 minute. Find its power output.

    • A1000 W
    • B60 000 W
    • C100 W
    • D6000 W

    Show answer

    Answer: A. 1000 W

    Explanation and discussion

20. Question 440· Work, energy and power· JAMB

    An electric motor takes in 2000 W and gives out 1500 W of useful power. Find its efficiency.

    • A133%
    • B75%
    • C25%
    • D50%

    Show answer

    Answer: B. 75%

    Explanation and discussion