Question

What is a solenoid?

Options

• Current produced in a coil due to electromagnetic induction

• A conductor wound into loops that produces current whenever a compass needle is near it

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

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

Answer 1

A solenoid is a long coil of wire. When current flows through it, the solenoid produces a magnetic field.