Question

a short circuited coil is placed in a time varying magnetic field. electrical power is dissipated due to the current induced in the coil. If the number of turn were to be quadrupled and the wire radius halved, electric power dissipiated would be

1) halved

2) same

3) doubled

4) quadrupled

Answer 1

Answer:

2- same

Explanation:

Here, P=power

e=EMF induced in coil

R=resistance of coil

N=no. of turns in coil

rho=resistivity of coil

l=length of the wire of the coil

A=area of cross-section of wire of

coil

r=radius of coil

x=radius of cross-section of wire of

coil