Question

Two solid bodies of equal masses are heated at the same rate under identical condition. The change is temperature is shown graphically as a function of time. The ratio of specific heat in solid form should be (S_A/S_B) –

• A. 4/3
• B. 21/8
• C. 15/8
• D. ¾

Answer 1

Answer: (B)

21/8

Answer 2

Let "P" is the rate at which heat is supplied to both A & B.

For A: P(6) = mC_A (40) … (1)

For B: P(4) = mC_B (70) … (2)

From (1) & (2),

$\frac{6}{4}$=$\frac{(40)}{(70)}$ Ž $\frac{C_{A}}{C_{B}}$=$\frac{420}{160}$=$\frac{21}{8}$