Generator effect Flashcards
1
Q
What is the generator effect?
A
- If there is a change in magnetic field around a conductor (a wire moves through a magnetic field), a potential difference is induced across the conductor
2
Q
What is neede for current to flow through the wire in the generator effect?
A
- The wire must be connected at the ends to form a complete circuit
3
Q
What happens to the potential difference when the wire is moved in the opposite direction in the generator effect?
A
- Direction of the potential difference swaps each time the wire swaps the direction in which it moves
4
Q
What happens to the potential difference when the wire stops moving and why?
A
- The potential difference disappears
- This is because the change in the magnetic field is inducing the potential difference and if the wire stops moving, there is no longer a change in the magnetic field
5
Q
How do we increase the strength of the potential difference in the generator effect?
A
- Change the strength of the magnetic field by using stronger magnets
- Move the wire / magnets more quickly so the change in magnetic field is faster
- Shape the wire into a coil and the more turns of the coil, the stronger the potential difference is
6
Q
Motor effect vs generator effect
A
- Motor effect uses electric current to generate motion
- Generator effect uses motion to generate electric current
- Motor effect uses DC current
- Generator effect produces AC current