The Motor Effect

Question 1

How do you increase the force felt by the motor effect?

Answer 1

Increase the magnet

Increase the current

Question 2

How do you reverse the force felt by the motor effect?

Answer 2

Reverse the poles of the magnet

Reverse the current

Question 3

What do each of the fingers stand for in Fleming’s left hand rule?

Answer 3

ThuMb: movement

First finger: field

SeCond: current

Question 4

What is a split ring commutator?

Answer 4

A way of swapping the contact every half turn to keep the motor moving in the same direction.

Question 5

How are electromagnetism and the motor effect used to create the vibrations for a megaphone?

Answer 5

The current flowing through the wire creates a magnetic field
> this field interacts with the permanent magnetic field

> causing a resultant force and the cone moves

> each time the current changes direction the direction of the force changes to the opposite direction