P15 - Electromagnetism

Question 1

How many poles do ALL magnets have?

Answer 1

2 poles

Question 2

What do all magnets produce?

Answer 2

A magnetic field

Question 3

What is a magnet?

Answer 3

A material or object that produces a magnetic field

Question 4

What are the poles of a magnet called?

Answer 4

The North pole and The South pole

Question 5

Lines of magnetic force come out of the ____________ Pole and go into the ____________
Pole

Answer 5

North pole
South pole

Question 6

What do closer/denser magnetic field lines suggest about the area of the magnetic field?

Answer 6

The magnetic field is stronger in that area

Question 7

What is the strange thing about magnets?

Answer 7

Not all magnetic materials are actually magnets

Question 8

What is an ACTUAL magnet?

Answer 8

Any object that produces a magnetic field

Question 9

What is a Magnetic material?

Answer 9

Any object that can be influenced by a magnetic field and has the POTENTIAL to become a magnet

Question 10

What are the 3 common magnetic elements?

Answer 10

Nickel
Cobalt
Iron

Question 11

What are permanent magnets?

Answer 11

Magnets that produce their own magnetic field all the time

Question 12

What are induced/ temporary magnets?

Answer 12

Magnets that only have a magnetic field temporarily

Question 14

How are induced magnets made?

Answer 14

When a piece of magnetic material that wasn’t an actual magnet, is put into a field of a permanent magnet

This induces the piece of magnetic material to develop its own magnetic field

Question 15

What happens when you remove an induced magnet from a permanent magnet?

Answer 15

The magnetic material that was once the induced magnet will lose its magnetism

Question 16

What are “magnetically soft” materials?

Answer 16

Where magnetic materials lose their magnetism very quickly

Question 17

What are “magnetically hard” materials?

Answer 17

Where magnetic materials lose their magnetism very slowly

Question 18

What are examples of a “magnetically soft” material?

Answer 18

Nickel and iron

Question 19

What are examples of a “magnetically hard” material?

Answer 19

Steel

Question 20

How do you represent current that has a magnetic field?

Answer 20

Using field lines

Question 21

What would the field lines of a magnetic current in a wire look like?

Answer 21

Circles around the wire

Question 22

If the direction of the current is UP, what is the direction of the circular magnetic field lines?

Answer 22

Anti-clockwise

Question 23

If the direction of the current is DOWN, what is the direction of the circular magnetic field lines?

Answer 23

Clockwise

Question 24

What is the motor effect?

Answer 24

A current carrying wire in the presence of a magnetic field will experience a force

Question 25

Do Flemings Left hand rule with you hands.

Answer 25

Point your thumb UP Point your index finger forwards and Point your middle finger to the side

Question 26

Explain what each index means in the Flemings left hand rule.

Answer 26

You index finger represents the direction of the magnetic field Your middle finger represents the direction of the current Your thumb now represents the force felt by the wire

Question 27

What is electromagnetism?

Answer 27

When electric currents produce their own magnetic field

Question 29

1

Question 31

How do you calculate the strength of a force?