Question

4.

(**) How can a current be induced in a closed circuit without the
use of a battery or electrical power?
A. By moving the circuit into a high temperature field
B. By moving the circuit into a gravitational field
By moving the circuit into a magnetic field
D. By moving the circuit into a nuclear field

Answer 1

C option bcz when a cicuit is placed in a magnetic field then current is infuced in it or emf is induced which is opposite to the electric current flowing through closed circuit