Magnets

Question 1

What is a magnet?

Answer 1

Any material or object that produces a magnetic field

Question 2

What are permanent magnets

Answer 2

They produce their own magnetic field

Question 3

What are induced magnets

Answer 3

They only have a magnetic friend temporarily

Question 4

What are the 4 magnetic elements

Answer 4

Nickle
Iron
Steel
Colbalt

Question 5

What is an example of a magnetically hard material

Answer 5

Steel

Question 6

What is an example of a magnetically soft material

Answer 6

Iron

Question 7

The force between a permanent and a induced magnet will….

Answer 7

Always be attractive

Question 8

What is electromagnetism

Answer 8

Electric currents produce their own magnetic field

Question 9

What does the direction of the magnetic feild depend on

Answer 9

Depends on the direction of the current

Question 10

What are the 4 ways to increase and electromagnets strength

Answer 10

1)increase the current
2)decrease the length
3)increase number of turns
4)adding a soft iron core

Question 11

What is the motor effect

Answer 11

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

Question 12

How to experience full force

Answer 12

A current carrying wite must be placed perpendicular to the magnetic field

Question 13

How do you work out force (the equation)

Answer 13

F=BIL

Question 14

What does the thumb, index finger and middle stand for in Fleming’s left hand rule

Answer 14

Thumb: force
Index: magnetic field
Middle: current