Electromagnetic Effects Flashcards
1
Q
Electromagnetic induction
A
Conductor moving across a magnetic field causing an e.m.f to be induced in ther conductor
2
Q
Measuring instrument of electric current
A
Galvanometer
3
Q
How to increase induced e.m.f (3)
A
Move the wire faster
Use a stronger magnet
Increase the length of the wire in the magnetic field (loop it through the field a few times)
4
Q
How to induce current in a solenoid
A
Moving the magnet in and out of the coil of wire
5
Q
Lenz’s law
A
Induced current always flows in a direction such that it opposes the change which produced it
6
Q
Why is electromagnetic induction significant
A
It allowed motors and generators to be discovered
