Electromagnetism Flashcards
1
Q
Magnetic field
A
Region where force is exerted on magnetic field
2
Q
Magnetic flux density
A
Strength of magnetic field
Force on 1m of wire carrying 1A at 90• to magnetic field
3
Q
Electromagnetic induction
A
Moving conductor through magnetic field causes electrons to accumulate at 1 end of rod, inducing emf and current
4
Q
Magnetic flux
A
Strength of magnetic field x area
5
Q
Flux linkage
A
Total strength of MF across loops of wire
6
Q
Faraday’s Law
A
Induced emf ~ rate of change of flux linkage
7
Q
Lenzs Law
A
Induced emf always in such direction as to oppose the change that caused it
