P2 - Generating electricity Flashcards
1
Q
How can the current be increased in a dynamo?
A
- use a stronger magnet
- increase the number of turns of wire on the coil
- rotate the magnet faster
2
Q
How is energy produced in a power station?
A
1) coal is burned to heat water and produce steam
2) the steam turns the turbines
3) the turbine turns the generator which produces electricity
3
Q
What is the equation for efficiency?
A
Efficiency = useful energy output/total energy input x 100
