Question

if the length of a wire is increased by 20% keeping its volume constant. what will be the % change in heat produced when connected across same potential difference ​

Answer 1

Answer:

THERE is no change produced in the heat developed in the wire as heat is independent of the length.

Explanation:

According to joules law of heating we know that heating effect is

$H=I^{2} RT$................(1)

Where H=heat produced, I=Current, R=Resistance,T=temperature

So as per the relation Heating effect is directly proportional to

(1)Square of the current flowing in the conductor

(2)resistance of the wire

(3)Temperature of the wire.

So, if the length of a wire is increased by 20% keeping its volume constant,THERE is no change produced in the heat developed in the wire as heat is independent of the length.