Motors, Generators, and Electromagnets

Front

What is an electromagnet?

Back

An electromagnet is a type of magnet in which the magnetic field is produced by an electric current. It is formed when a wire is wrapped around an iron core.

Front

What energy transformation occurs when a clock lights up when plugged in?

Back

The energy transformation is from electrical energy to light energy.

Front

What happens when two north poles of magnets are brought together?

Back

The two north poles repel each other.

Front

What rotates inside a coil of wire in large generators to produce electric current?

Back

Magnets rotate inside a coil of wire to produce electric current.

Front

Which subatomic particle has a negative charge?

Back

The electron has a negative charge.

Front

What is a generator?

Back

A generator is a device that converts mechanical energy into electrical energy.

Front

What is the principle behind how motors work?

Back

Motors work on the principle of electromagnetism, where electric current in a coil creates a magnetic field that interacts with magnets to produce motion.

Front

What is the role of an iron core in an electromagnet?

Back

The iron core enhances the magnetic field produced by the electric current in the wire.

Front

What is the difference between AC and DC current?

Back

AC (Alternating Current) changes direction periodically, while DC (Direct Current) flows in one direction.

Front

What is magnetic field?

Back

A magnetic field is the region around a magnet where magnetic forces can be detected.