Question

Which of the following would cause electromagnetic induction?

The current in a loop of coils is constant.
A loop of coils is placed near high voltage power lines with alternating current.
A constant current is supplied to a circuit board in your computer.
Your phone is turned on after being fully charged.

Answer 1

The loop of coils - Electromagnetic induction is caused a changing magnetic field moving thru a closed loop(s) of coils