Introduction to magnetism:

Question 1

What happens when a current flows through a conducting wire?

Answer 1

= magnetic field is produced around the wire

=

Question 2

How can we prove there is a magnetic field around the wire?

Answer 2

= Using a compass
= when the electrical circuit is off, needle of compass points to earths magenetic field
= current is on compass needle deflects

Question 3

What is the strength of the magnetic field dependant on?

Answer 3

= size of the current
= distance from the wire
=

Question 4

How do you change the direction of the magnetic field?

Answer 4

= change direction of current

= magnetic field reverses