Practice # 1 Magnetism

Front

What is a charged atom known as?

Back

Ion

Front

What is the property of an object to attract certain metallic substances?

Back

Magnetism

Front

What is the measure of opposition to the flow of magnetic lines through a material?

Back

Reluctance

Front

What effect does adding a soft iron core have on a current-carrying coil?

Back

Increases the number of flux lines and increases their concentration.

Front

What term describes how easily magnetic flux can penetrate a material?

Back

Permeability

Front

What is the unit of magnetic flux density?

Back

Tesla (T)

Front

What is the relationship between electric current and magnetic fields?

Back

An electric current produces a magnetic field.

Front

What is the principle behind electromagnets?

Back

Electromagnets work by using electric current to generate a magnetic field.

Front

What is ferromagnetism?

Back

Ferromagnetism is a phenomenon where certain materials can become permanent magnets.

Front

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

Back

A permanent magnet maintains its magnetism without an external power source, while an electromagnet requires electric current.