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JAMB UTME Physics 2012 past questions and answers

This 2012 JAMB UTME Physics set has 40 practice questions. Try these 5 free sample questions, tap a question to reveal the answer and explanation. Then practise the whole 2012 set with instant marking.

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Sample JAMB UTME Physics 2012 questions

1. An object is placed 60 cm from a converging lens of focal length 20 cm. How far from the lens is its real image formed?
  1. 30 cm
  2. 15 cm
  3. 40 cm
  4. 80 cm

Answer: A. 30 cm

Using 1/f = 1/u + 1/v gives 1/v = 1/20 - 1/60 = 1/30, so v = 30 cm.

2. Light passes from glass of refractive index 1.5 into air. What is the sine of the critical angle?
  1. 1.5
  2. 2/3
  3. 1/3
  4. 0.5

Answer: B. 2/3

At the critical angle, sin c = n_air/n_glass = 1/1.5 = 2/3.

3. A water wave has frequency 250 Hz and wavelength 1.2 m. What is its speed?
  1. 208 m/s
  2. 250 m/s
  3. 300 m/s
  4. 350 m/s

Answer: C. 300 m/s

Wave speed is fλ = 250 x 1.2 = 300 m/s.

4. Two tuning forks of frequencies 256 Hz and 260 Hz are sounded together. What beat frequency is heard?
  1. 516 Hz
  2. 260 Hz
  3. 2 Hz
  4. 4 Hz

Answer: D. 4 Hz

The beat frequency is the difference between the frequencies, 260 - 256 = 4 Hz.

5. A person hears an echo 0.8 s after shouting toward a cliff. If sound travels at 340 m/s, how far away is the cliff?
  1. 136 m
  2. 272 m
  3. 340 m
  4. 425 m

Answer: A. 136 m

The sound travels to the cliff and back, so the distance is 340 x 0.8/2 = 136 m.

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