Question

When a load W is hung from a wire,it extends by ∆l. The heat produced in the process is

Answer 1

The heat produced in the process is equal to W ∆I.

•The heat produced in this process is equal to the work done on the wire.

Work done which is equal to heat produced (H) is given by:

H = F • ∆x

where F is force and ∆x is displacement in direction of force under the force.

•Weight is a direct measure of the force with which the wire is pulled.

Hence,

H = W ∆I

•Hence the heat produced in the process is equal to the produce of load W and introduced extension in wire ∆I, hence = W ∆I