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JAMB UTME Physics 2007 past questions and answers

This 2007 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 2007 set with instant marking.

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Sample JAMB UTME Physics 2007 questions

1. How much heat is required to melt 0.50 kg of ice at 0 C if the specific latent heat of fusion of ice is 3.34 x 10^5 J/kg?
  1. 1.67 x 10^5 J
  2. 6.68 x 10^5 J
  3. 3.34 x 10^5 J
  4. 1.67 x 10^4 J

Answer: A. 1.67 x 10^5 J

The heat required is mL = 0.50 x 3.34 x 10^5 = 1.67 x 10^5 J.

2. What energy is needed to vaporize 0.20 kg of water at its boiling point if its specific latent heat of vaporization is 2.26 x 10^6 J/kg?
  1. 45.2 kJ
  2. 452 kJ
  3. 2.26 MJ
  4. 11.3 kJ

Answer: B. 452 kJ

Using Q = mL gives 0.20 x 2.26 x 10^6 = 4.52 x 10^5 J, or 452 kJ.

3. According to the kinetic theory, what happens to the average kinetic energy of an ideal gas molecule when the absolute temperature of the gas is doubled?
  1. It is halved
  2. It is quadrupled
  3. It is doubled
  4. It remains unchanged

Answer: C. It is doubled

The average molecular kinetic energy is directly proportional to the absolute temperature.

4. A slab has thermal conductivity 0.8 W/(m K), area 0.02 m^2 and thickness 0.10 m; how much heat passes through it in 600 s when its faces differ in temperature by 50 K?
  1. 480 J
  2. 800 J
  3. 2,400 J
  4. 4,800 J

Answer: D. 4,800 J

Q = kAΔTt/L = 0.8 x 0.02 x 50 x 600 / 0.10 = 4,800 J.

5. A source makes one complete oscillation every 0.004 s; what is its frequency?
  1. 250 Hz
  2. 25 Hz
  3. 0.004 Hz
  4. 4,000 Hz

Answer: A. 250 Hz

Frequency is the reciprocal of period, so f = 1/0.004 = 250 Hz.

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