Magentism test 24/06/24

Question 1

two like poles

Answer 1

repel

Question 2

two opposite poles

Answer 2

attract

Question 3

the earth is a

Answer 3

magnet

Question 4

there is a

Answer 4

North and South pole

Question 5

compasses and magnets that are free to spin will

Answer 5

naturally line up with the earths magnetic field

Question 6

only metals are

Answer 6

Magnetic

Question 7

4 magnetic materials are

Answer 7

iron
cobalt
nickel
steel

Question 8

There are two ways to test for magnetism.

Answer 8

place your object next to a known magnetic materiel and see if they attract.

place a known magnet next to your object if you can make them repel then the object must be a magnet.

Question 9

a magnetic field is

Answer 9

A regional of space where a magnetic material experiences a magnet force

Question 10

magnets can attract

Answer 10

other magnets and magnetic materials

Question 11

magnets can only repel

Answer 11

other magnets

Question 12

magnetic fields are made of field lines

Answer 12

we indicate the direction of field lines using arrows these point form north to south

Question 13

an electromagnet is made form a current carrying wire such as

Answer 13

a Solenoid

Question 14

you can increase the strength is an electro magnet in 3 ways

Answer 14

increase the current

addmore turns to the solenoid

pug a soft-iron core in the centre

Question 15

you can switch on an electromagnet by

Answer 15

passing a current through it

Question 16

you can switch off an electromagnet by

Answer 16

stopping passing current through it

Question 17

iron is used for electromagnet cores because

Answer 17

it’s a soft magnetic material this means it’s easy to magnetise and demagnetise

Question 18

A Strong magnet will have

Answer 18

A steel core which is for permanent magnets because it is hard to magnetise but keeps its magnetism.

Question 19

A soft magnet will have

Answer 19

an iron core because it is soft and used in temporary magnets because it’s easy to magnetise but also loses its magnetism easily

Question 20

A motor is made from a loop of rotor coil

Question 21

when current flows through the wire a magnetic field is produced around the wire

Question 22

the current in each side of the wire flows in opposite directions so one side is pushed up and the other pushed down causing it to rotate