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JAMB Physics 1986 Question 25

Question 25

Quantity of Heat

When two objects P and Q are supplied with the same quantity of heat, the temperature change in P is observed to be twice that of Q. The mass of P is half that of Q. The ratio of the specific heat capacity of P to Q is

  1. A.1 : 4
  2. B.4 : 1
  3. C.1 : 1
  4. D.2 : 1
Show the answer and explanation

Answer: C (1 : 1)

Explanation

Q = mcθ is the same for both: cP × (½m) × 2θ = cQ × m × θ, so cP = cQ and the ratio is 1 : 1.