Solenoids for Edexcel GCSE Physics
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
A solenoid electromagnet is made by wrapping insulated wire around an iron core.
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.
Electromagnets are commonly used in devices called relays. What is a relay?
Relay is an electrically operated switch.
What is the name given to a solenoid with an iron core?
Complete the sentence: a solenoid consists of a .... coiled up in a spiral shape.
Why is an electromagnet made from iron not steel?
Iron can be magnetised and demagnetised much easier than steel can be.
Are solenoids temporary or permanent magnets?
End of page