Question

Three metals, A, B and C, are supplied with the same quantity of heat. Their masses are in the ratio 2 : 3 : 4. If they show the same rise in temperature, then the ratio of their thermal capacities will be:

Options

• 1 : 1 : 1

• 4 : 3 : 2

• 2 : 3 : 4

• 2 : 3 : 1

Answer 1

1 : 1 : 1

Explanation:

Thermal capacity is the heat supplied divided by the temperature rise:

C' = `Q/(Delta T)`

All three metals receive the same heat and have the same temperature rise, so their thermal capacities are equal. The mass ratio does not change this result.