Chapter 4 Making Magnets Review

Front

What is an electromagnet?

Back

A magnet created by wrapping a current-carrying wire around a ferromagnetic core.

Front

What type of current do batteries generate?

Back

Direct current (DC).

Front

What device converts mechanical energy into electrical energy?

Back

Generator.

Front

What is alternating current (AC)?

Back

An electric current that changes direction in a regular pattern.

Front

What must happen for current to flow through a generator?

Back

A wire loop in the generator must rotate within a magnetic field.

Front

Define a permanent magnet.

Back

A magnet that maintains its magnetic properties without the need for an external power source.

Front

What is the role of a transformer?

Back

A device that changes the voltage of alternating current.

Front

What is a magnetic pole?

Back

The region of a magnet where the magnetic force is strongest, typically referred to as north and south poles.

Front

What is the difference between direct current and alternating current?

Back

Direct current (DC) flows in one direction, while alternating current (AC) changes direction periodically.

Front

What is a ferromagnetic material?

Back

A material that can be magnetized and is attracted to magnets, such as iron, nickel, and cobalt.