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ICSE Class 10 Physics Question 12 of 27

Solved 2023 Question Paper ICSE Class 10 Physics — Question 26

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Question

Question 3(iv)

Thermal capacities of substances A and B are same. If mass of A is more than mass of B then:

(a) Which substance will have more specific heat capacity?

(b) Which substance will show greater rise in temperature if the same amount of heat is supplied to both?

Answer

(a) B will have more specific heat capacity.
Reason —

Specific heat capacity (c)=Heat Capacity of body (C’)mass of body (m)∴Specific heat capacity (c)∝1mass\text{Specific heat capacity (c)} = \dfrac{\text{Heat Capacity of body (C')}}{\text{mass of body (m)}} \\[1em] \therefore \text{Specific heat capacity (c)} ∝ \dfrac{1}{\text{mass}}

∴ Specific heat capacity of B will be more as its mass is less.

(b) Both substances will show equal rise in temperature as their thermal capacities are the same.