Electromagentism Flashcards
1
Q
Lines of magnetic force can’t…
A
Cross
2
Q
How can you distort lines of magnetic flux
A
Using a soft iron bar
3
Q
Right hand corkscrew
A
If you put current through a conductor - will create a circular magnetic field in the direction of a right hand corkscrew
4
Q
How can you incase the strength of an electromagnet
A
Increasing the current
Increasing the no of turns
Inserting a soft iron core
5
Q
Relay
A
A small current activating an electromagnet - can be used to control a much larger current flowing through the relay
Allows you to operate high current using a small switch
Has a hinged arm and 1 set of contacts
