Electromagnetism - Topic 4 Lessons 3 & 4 (p. 78-95)

Front

What components do you need to build an electromagnet?

Back

A wire, a conductor, and a battery.

Front

What is an electromagnet?

Back

An electrified coil of wire wrapped around a ferromagnetic core.

Front

What type of core will create the strongest electromagnet?

Back

Iron.

Front

When electricity flows through the electric motor of a blender, what form of energy is produced?

Back

Kinetic energy.

Front

If you reverse the flow of current through an electromagnet, what happens to the magnetic field?

Back

The magnetic field it produces reverses its polarity.

Front

What is the role of a battery in an electromagnet?

Back

It provides the electrical energy needed to create a magnetic field.

Front

What is a ferromagnetic material?

Back

A material that can be magnetized, such as iron.

Front

How does increasing the number of coils in an electromagnet affect its strength?

Back

It increases the strength of the magnetic field.

Front

What happens to the magnetic field when the current is turned off in an electromagnet?

Back

The magnetic field disappears.

Front

What is the difference between a permanent magnet and an electromagnet?

Back

A permanent magnet produces a constant magnetic field, while an electromagnet's field can be turned on and off.