Electromagnetism is essentially magnetism that comes about due to an electric current.
When a current flows through a conducting wire a magnetic field is produced around the wire.
The strength of the magnetic field depends on the current through the wire and, like before, the distance from the wire.
- Name three things that can be done to increase the magnetic field around an electromagnet.
- Your answer should include: increase number of coils / increase current / iron core
- What is the shape of magnetic field around an electromagnet?
- bar magnet
Explanation: It is the same as a bar magnet
A solenoid is a coil of wire and the magnetic field takes a similar shape to that of a bar magnet.
If an iron core was added inside the coils then the magnetic strength would increase. In addition, increasing the number of coils or the __current __would also increase the magnetic field.
An electromagnet is a solenoid with an iron core.