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JAMB UTME Physics 2003 past questions and answers

This 2003 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 2003 set with instant marking.

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Sample JAMB UTME Physics 2003 questions

1. A brass rod is 2.0 m long at 20°C. If its linear expansivity is 1.2 x 10^-5 K^-1, how much does its length increase when heated to 70°C?
  1. 1.2 mm
  2. 0.12 mm
  3. 12 mm
  4. 0.60 mm

Answer: A. 1.2 mm

The increase is ΔL = αLΔT = 1.2 x 10^-5 x 2.0 x 50 = 0.0012 m, or 1.2 mm.

2. How much heat is required to raise the temperature of 0.50 kg of water by 10 K? Take the specific heat capacity of water as 4200 J kg^-1 K^-1.
  1. 2,100 J
  2. 21,000 J
  3. 42,000 J
  4. 210,000 J

Answer: B. 21,000 J

Using Q = mcΔT gives Q = 0.50 x 4200 x 10 = 21,000 J.

3. How much energy is needed to melt 0.20 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. 6,680 J
  2. 33,400 J
  3. 66,800 J
  4. 668,000 J

Answer: C. 66,800 J

The melting energy is Q = mL = 0.20 x 3.34 x 10^5 = 66,800 J.

4. A fixed mass of gas is kept at constant volume and its absolute temperature is doubled. What happens to its pressure?
  1. It is halved
  2. It remains unchanged
  3. It becomes four times as great
  4. It doubles

Answer: D. It doubles

At constant volume, the pressure of a fixed mass of gas is directly proportional to its absolute temperature.

5. A wave has frequency 50 Hz and wavelength 0.80 m. What is its speed?
  1. 40 m s^-1
  2. 62.5 m s^-1
  3. 0.016 m s^-1
  4. 50.8 m s^-1

Answer: A. 40 m s^-1

Wave speed v = fλ = 50 x 0.80 = 40 m s^-1.

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