P5.5

Question 1

What can a current-carrying wire or coil do?

Answer 1

Exert a force on a permanent magnet,or on another current-carrying wire or coil nearby

Question 2

What does an electric motor transfer?

Answer 2

Electrical energy into rotational energy

Question 3

A motor is used in an electric car to…..

Answer 3

Spin the wheels

Question 4

A motor is used in a DVD player to….

Answer 4

Spin the disk

Question 5

A motor is used in a hard drive disk to….

Answer 5

Spin the platter

Question 6

The motor effect definition

Answer 6

The term used when a current-carrying wire in the presence of a magnetic field experiences a force

Question 7

What can the motor effect result in?

Answer 7

A turning force on a rectangular current-carrying coil placed in a uniform magnetic field

Question 8

What can the motor effect be used to produce? To ensure what?

Answer 8

Continuous rotation of the coil,by using a communicator to ensure that the direction of the current in the coil is reversed at an appropriate point in each revolution

Question 9

A current carrying wire experiences no force when?…

Answer 9

It is parallel to the lines of force of a magnetic field

Question 10

If a wire carrying a flow of…

Answer 10

Charge is placed at right angles to a magnetic field,it experiences a force