Question

What is a changing magnetic field?

विकल्प

• A long coil of wire that produces a magnetic field when current flows through it

• Current produced in a coil due to electromagnetic induction

• A conductor wound into loops

• A magnetic field whose strength or effect through a coil changes

Answer 1

A changing magnetic field is one whose strength or effect through a coil changes. Such a change can produce electric current by electromagnetic induction.