Question

What happens when the current in a nearby solenoid coil is switched on or off?

Options

• Electricity and magnetism become separate phenomena

• The coil becomes a wireless charger

• A current is produced by electromagnetic induction

• The solenoid becomes a magnetic compass needle

Answer 1

Switching current in a nearby solenoid coil on or off changes its magnetic field. That change can induce a current in a nearby conductor or coil.