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NECO SSCE Physics 2008 past questions and answers

This 2008 NECO SSCE 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 2008 set with instant marking.

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Sample NECO SSCE Physics 2008 questions

1. A metal rod is 2.0 m long at 20°C. If its linear expansivity is 1.2 x 10^-5 °C^-1, how much does its length increase when heated to 70°C?
  1. 1.2 mm
  2. 0.12 mm
  3. 12 mm
  4. 2.4 mm

Answer: A. 1.2 mm

The increase is alpha L deltaT = 1.2 x 10^-5 x 2.0 x 50 = 0.0012 m, or 1.2 mm.

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

Answer: B. 21,000 J

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

3. How much energy is required to melt 0.20 kg of ice at 0°C? 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 energy is mL = 0.20 x 3.34 x 10^5 = 66,800 J.

4. A fixed mass of gas at constant volume has a pressure of 100 kPa at 300 K. What is its pressure at 450 K?
  1. 75 kPa
  2. 100 kPa
  3. 125 kPa
  4. 150 kPa

Answer: D. 150 kPa

At constant volume P/T is constant, so P2 = 100 x 450/300 = 150 kPa.

5. A thermometer reads 10° at the ice point and 90° at the steam point. What Celsius temperature corresponds to a reading of 40° on this thermometer?
  1. 37.5°C
  2. 40°C
  3. 50°C
  4. 60°C

Answer: A. 37.5°C

The fraction of the scale is (40 - 10)/(90 - 10) = 30/80, giving 100 x 30/80 = 37.5°C.

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