# The Motor effect and using Physics to keep things moving,

HideShow resource information
• Created by: Heather
• Created on: 17-05-14 19:14
In the motor effect, how can the size of the force be increased? (2)
-Increasing the current. -using a stronger magnet,
1 of 7
How does the angle of the wire to the magnet affect the force? When does it work best/least?
The force is greatest when perpendicular to the magnetic filed but zero when parallel,
2 of 7
When is the force reversed?
When the direcion of the current or the magnetic field is reversed,
3 of 7
In an electric motor, how do we control the speed?
By changing the current in the motor,
4 of 7
In an electric motor, why does when a current passes through the coil, why does it spin? (2)
-A force acts on each side of the coil due to the motor effect, -The force on one side is in the opposite direction to the force on the opposite side,
5 of 7
How is a loudspeaker desgined to make a diaphragm attached to a coil vibrate?
When alternating current pases through the coil,
6 of 7
Why does the coil vibrate?
As when a current passes through the coil, a force cue to the motor effect casues the coil to move, -Each tiem the current changes direction, the force reverses its direction so the coil is repeatedly forced back and forth which mkaes it vibrate,
7 of 7

## Other cards in this set

### Card 2

#### Front

How does the angle of the wire to the magnet affect the force? When does it work best/least?

#### Back

The force is greatest when perpendicular to the magnetic filed but zero when parallel,

### Card 3

#### Front

When is the force reversed?

### Card 4

#### Front

In an electric motor, how do we control the speed?

### Card 5

#### Front

In an electric motor, why does when a current passes through the coil, why does it spin? (2)