Electromagnets

alexpalex99
Mind Map by alexpalex99, updated more than 1 year ago
alexpalex99
Created by alexpalex99 over 5 years ago
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Mind Map on Electromagnets, created by alexpalex99 on 12/16/2014.

Resource summary

Electromagnets
1 A wire carrying a current has a magnetic field around it
1.1 Magnetic fields show the strength, shape and direction of the force.
2 The magnetic field around a solenoid has the same shape as the field round a bar magnet
2.1 The magnetic field inside the solenoid can be used to magnetise magnetically soft metals
2.1.1 The strength of the magnetic field can be increased by: Using a larger current. Using more turns of wire on the coil, using a 'soft ' iron core, bringing the poles closer together
3 Electromagnets are used in many things such as:
3.1 The electric bell
3.2 Doorbell
3.3 Electromagnetic relay
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