magnetism Flashcards
1
Q
magnetic field
A
any region of space where magnetic forces are felt
2
Q
magnetic flux density
A
a point in magnetic field whose magnitude is equal to the force
3
Q
electromagnetic induction
A
caused by change in magnetic field passing through a coil
4
Q
faradays law
A
the size of the emf produced is directly proportional to the rate of change of flux
5
Q
lenzs law
A
the direction of an induced current is always such to oppose the change providin git
6
Q
electric generator
A
converts mechanical energy to electrical
7
Q
transformer
A
device to change value of alternating voltage
8
Q
mutual induction
A
when emf produced in coils an induced emf is produced in nearby coil
9
Q
self induction
A
changing magnetic field opposes the changing current
