P5.1 - Electricity & Magnetism

Question 1

Magnetism describes

Answer 1

the ability of magnets to attract (pull towards) and repel (push away) other magnets without touching them.

Question 2

Magnets have a

Answer 2

north and south pole

Question 3

Opposite poles on magnets

Answer 3

attracted to each other

Question 4

Same poles of magnets (north and north or south and south)

Answer 4

repel to each other

Question 5

The forces between magnets are caused by

Answer 5

invisible magnetic fields

Question 6

When the magnetic field of two magnets overlaps it causes

Answer 6

the magnets to push or pull

Question 7

What are the only pure metals that can be turned in a magnetic (magnetic materials)

Answer 7

iron, cobalt and nickel

Question 8

Magnetically hard materials such as steel are

Answer 8

magnetic once they have magnetized

Question 9

When we refer to magnets we mean

Answer 9

permanent magnets that are made of magnetically hard materials

Question 10

magnetically soft materials like iron are

Answer 10

materials that do not stay magnetized

Question 11

magnetic materials like iron won’t

Answer 11

repel or attract other iron

Question 12

magnetic materials are attracted to

Answer 12

magnets

Question 13

What are the properties of magnetic materials

Answer 13

Magnetic materials can be attracted to by magnet but not repelled.
only 2 magnets can repel each other
non magnetic materials will never attract to magnets
permanent magnets are always magnetic

Question 14

Permanent magnets are responsible for

Answer 14

inducing temporary poles in magnetic materials causing them to attract

Question 15

Induced magnets are magnetic materials that

Answer 15

become temporary magnets when in a magnetic field

Question 16

when moved away from permanent magnet a magnetic material will

Answer 16

stop being a magnet

Question 17

The pole of a permanent magnet always induces

Answer 17

the opposite pole in an unmagnetized piece of magnetic material to attract

Question 18

What are the ways in which magnetic materials can be turned into permanent magnets

Answer 18

Hammering (putting a magnetic material in a strong magnetic force and hitting it with a hammer)
Solenoid and direct current (putting magnetic material inside a coil of wire and passing a direct current through a wire for several seconds)
Stroking (stroking the material in the same direction with a permanent magnet)

Question 19

Magnetics have

Answer 19

magnetic field lines around them

Question 20

The more concentrated field lines are the

Answer 20

stronger the magnetic effect and force

Question 21

What is an electromagnet

Answer 21

it is made from a cylindrical coil of wire that has an electric current passing through it

Question 22

An electromagnet is only magnetic when

Answer 22

there is electrical current flowing through it

Question 23

when an electrical current is switched off the wire loses

Answer 23

its magnetism

Question 24

What are the 3 ways to increase the strength of an electromagnet

Answer 24

More coils
Higher electric current
Iron core placed inside solenoid