Question

Ratio of thermal capacity of the body and its water equivalent is :

• A. equal to one
• B. less than one
• C. more than one
• D. none of these

Answer 1

The correct option is A equal to one

Thermal capacity of a body is the amount of heat required to raise the temperature of whole body through $1^o$ and is given by, thermal capacity $=mc$.

Water equivalent of a body is the mass of the water which would absorb or evolve the same amount of heat as is done by the body in rising or falling through the same range of temperature, and is given by, $w=mc$.

We can see that thermal capacity and water equivalent of a body are numerically equal, therefore their ratio is equal to one .