JAMB and WAEC Physics questions

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

1. Question 761· Thermal expansion· JAMB

   The anomalous expansion of water means that water

   • Afreezes at 4 °C
   • Bexpands uniformly
   • Cboils at 0 °C
   • Dcontracts when heated from 0 °C to 4 °C

   Show answer

   Answer: D. contracts when heated from 0 °C to 4 °C

   Explanation and discussion

2. Question 762· Thermal expansion· WAEC

   Gaps are left between lengths of railway lines to allow for

   • Aexpansion in hot weather
   • Bdrainage of rainwater
   • Ceasy repair
   • Dnoise reduction

   Show answer

   Answer: A. expansion in hot weather

   Explanation and discussion

3. Question 763· Thermal expansion· JAMB

   The real expansion of a liquid in a container is equal to

   • Aits apparent expansion only
   • Bits apparent expansion minus the expansion of the container
   • Cthe expansion of the container only
   • Dits apparent expansion plus the expansion of the container

   Show answer

   Answer: D. its apparent expansion plus the expansion of the container

   Explanation and discussion

4. Question 764· Thermal expansion· WAEC

   A metal rod 2 m long expands by 0.8 mm when heated through 20 K. Its linear expansivity is

   • A4 × 10⁻⁵ K⁻¹
   • B2 × 10⁻⁵ K⁻¹
   • C8 × 10⁻⁴ K⁻¹
   • D1 × 10⁻⁵ K⁻¹

   Show answer

   Answer: B. 2 × 10⁻⁵ K⁻¹

   Explanation and discussion

5. Question 765· Thermal expansion· JAMB

   A bimetallic strip bends when heated because the two metals have different

   • Alinear expansivities
   • Bdensities
   • Cspecific heat capacities
   • Dmelting points

   Show answer

   Answer: A. linear expansivities

   Explanation and discussion

6. Question 766· Thermal expansion· JAMB

   A bimetallic strip bends when heated because

   • Athe metals melt
   • Bboth metals contract
   • Cits two metals expand by different amounts
   • Dit becomes magnetised

   Show answer

   Answer: C. its two metals expand by different amounts

   Explanation and discussion

7. Question 767· Thermal expansion· WAEC

   Gaps are left between lengths of railway line in order to

   • Aallow for expansion in hot weather
   • Breduce noise
   • Csave steel
   • Ddrain rainwater

   Show answer

   Answer: A. allow for expansion in hot weather

   Explanation and discussion

8. Question 768· Thermal expansion· JAMB

   A metal has linear expansivity 2 × 10⁻⁵ K⁻¹. Its cubic expansivity is about

   • A8 × 10⁻⁶ K⁻¹
   • B2 × 10⁻⁵ K⁻¹
   • C4 × 10⁻⁵ K⁻¹
   • D6 × 10⁻⁵ K⁻¹

   Show answer

   Answer: D. 6 × 10⁻⁵ K⁻¹

   Explanation and discussion

9. Question 769· Thermal expansion· WAEC

   A bimetallic thermostat works because the two metals

   • Aexpand by different amounts when heated
   • Bhave the same expansivity
   • Care magnetic
   • Ddo not expand

   Show answer

   Answer: A. expand by different amounts when heated

   Explanation and discussion

10. Question 770· Waves· JAMB

    Which of the following is a longitudinal wave?

    • Asound
    • Bradio wave
    • Clight
    • Dwater ripple

    Show answer

    Answer: A. sound

    Explanation and discussion

11. Question 771· Waves· WAEC

    Which of these is a longitudinal wave?

    • ALight wave
    • BRadio wave
    • CSound wave
    • DWater ripple

    Show answer

    Answer: C. Sound wave

    Explanation and discussion

12. Question 772· Waves· WAEC

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

    • A500 m/s
    • B735 m/s
    • C0.00136 m/s
    • D340 m/s

    Show answer

    Answer: D. 340 m/s

    Explanation and discussion

13. Question 773· Waves· JAMB

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

    • A340 Hz
    • B170 Hz
    • C680 Hz
    • D1.47 Hz

    Show answer

    Answer: C. 680 Hz

    Explanation and discussion

14. Question 774· 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

15. Question 775· Waves· WAEC

    In a transverse wave the particles of the medium vibrate

    • Anot at all
    • Bparallel to the direction of travel
    • Cin circles only
    • Dperpendicular to the direction of travel

    Show answer

    Answer: D. perpendicular to the direction of travel

    Explanation and discussion

16. Question 776· 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

17. Question 777· Waves· WAEC

    Find the period of a wave whose frequency is 25 Hz.

    • A0.4 s
    • B25 s
    • C0.04 s
    • D4 s

    Show answer

    Answer: C. 0.04 s

    Explanation and discussion

18. Question 778· Waves· WAEC

    A radio station broadcasts at 100 MHz. If radio waves travel at 3 × 10⁸ m/s, find the wavelength.

    • A0.33 m
    • B3 m
    • C30 m
    • D3 × 10¹⁶ m

    Show answer

    Answer: B. 3 m

    Explanation and discussion

19. Question 779· 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

20. Question 780· Waves· WAEC

    Which electromagnetic radiation has the shortest wavelength?

    • Agamma rays
    • Bradio waves
    • Cinfrared
    • Dvisible light

    Show answer

    Answer: A. gamma rays

    Explanation and discussion