P3 - The Simple Electric Motor Flashcards
1
Q
What does a split-ring commutator do to an electric motor?
A
Swaps the contracts every half turn to keep the motor rotating in the same direction.
2
Q
How can the direction of a simple electric motor be reversed?
A
The polarity of the DC can be swapped, or the magnetic poles can be swapped.
3
Q
What happens when you link the coil of an electric motor to an axle?
A
The axle spins round.
4
Q
Name 3 uses of electric motors.
A
Food mixers, CD players, fan heaters.
5
Q
What 2 factors speed up a simple electric motor?
A
More current and stronger magnetic field.
