Y10Magnets

Question 1

Any material that a magnet would attract is an example of a …?… material

Answer 1

magnetic

Question 2

A ..?.. can be made only from a magnetic material

Answer 2

magnet

Question 3

Iron and …?… are examples of magnetic materials

Answer 3

steel

Question 4

The places on a magnet where the magnetic force is concentrated are called the ..?.. of the magnet

Answer 4

poles

Question 5

Like poles …?…

Answer 5

repel

Question 6

Unlike poles …?…

Answer 6

attract

Question 7

The region around a magnet, where it exerts a magnetic force, is called a magnetic …?…

Answer 7

field

Question 8

The …?… on magnetic field lines always point from North to South

Answer 8

arrows

Question 9

If two …?… poles are placed next to each other, the field lines will flow directly from one to the other

Answer 9

unlike

Question 10

If two …?… poles are placed next to each other, there will be a neutral point between them

Answer 10

like

Question 11

A neutral point is a point where the total magnetic force is …?

Answer 11

zero

Question 12

A coil of wire that you can pass electric current through is called a …?

Answer 12

solenoid

Question 13

A solenoid with a current flowing through it behaves like a weak …?

Answer 13

magnet

Question 14

The magnetic field pattern around a solenoid looks the same as the one around a …?

Answer 14

bar magnet

Question 15

If you place an iron core down the middle of a solenoid, the strength of the electromagnet …?

Answer 15

increases

Question 16

If you reduce the number of turns on the coil in an electromagnet, the strength of the electromagnet …?

Answer 16

decreases

Question 17

You can increase the strength of an electromagnet by …?… the current flowing through it.

Answer 17

increasing

Question 18

One advantage of an electromagnet, which makes it useful as a lifting magnet, is that it can be …????

Answer 18

switched on and off

Question 19

Electromagnets can be made much …?… than permanent magnets

Answer 19

stronger

Question 20

A relay is an electrically controlled …?

Answer 20

switch

Question 21

A relay can use a small current to control a dangerously …?… current

Answer 21

large

Question 22

When an electric bell is switched on, current flows through its …?

Answer 22

electromagnet

Question 23

The electromagnet in a bell attracts the …??… armature

Answer 23

soft iron

Question 24

As the hammer moves to hit the gong in an electric bell, it switches off the electromagnet by …?… contacts in the electromagnet circuit.

Answer 24

separating

Question 25

After hitting the gong, the hammer in an electric bell springs back, closing the gap between the contacts and allowing …?… to flow again

Answer 25

current

Question 26

The shape of the magnetic field pattern for a bar magnet

Answer 26