1
Q
how and why an emf is induced ?
A
when magnet is moving , magnetic flux in the coil changes , this induces an emf in the coil .
2
Q
why does the needle move in opposite direction when magnet moves in opposite direction or poles are reversed ?
A
because induced current in coil always try to oppose the motion producing it .
3
Q
magnetic flux def
A
it the product of magnetic flux density and area perpendicular to the magnetic field .
4
Q
faradays law def
A
magnitude of emf induced is directly proportional to rate of change of magnetic flux linkage .
5
Q
A
Physics A2
flashcards
Decks in class (6)
# Cards
