ย 

Solenoids for SQA National 5 Physics

Solenoids

This page covers the following topics:

1. How a solenoid works
2. Use of iron core and other materials
3. Solenoids, magnetic fields, direction

A solenoid is shown in the diagram

How a solenoid works

A solenoid electromagnet is made by wrapping insulated wire around an iron core.

Use of iron core and other materials

An electromagnet is a solenoid with an iron core. The force between an electromagnet or magnet and a magnetic material is always one of attraction.

Solenoids, magnetic fields, direction

1

Electromagnets are commonly used in devices called relays. What is a relay?

Relay is an electrically operated switch.

Electromagnets are commonly used in devices called relays. What is a relay?

2

What is the name given to a solenoid with an iron core?

electromagnet

What is the name given to a solenoid with an iron core?

3

Complete the sentence: a solenoid consists of a .... coiled up in a spiral shape.

wire

Complete the sentence: a solenoid consists of a .... coiled up in a spiral shape.

4

Why is an electromagnet made from iron not steel?

Iron can be magnetised and demagnetised much easier than steel can be.

Why is an electromagnet made from iron not steel?

5

Are solenoids temporary or permanent magnets?

temporary

Are solenoids temporary or permanent magnets?

End of page

ย