Electromagnetism

Question 1

What is electromagnetism?

Answer 1

when an electric current produce their own magnetic field

Question 2

how do the magnetic field lines act around a wire?

Answer 2

magnetic field lines are circular around the wire and are more dense the closer they are to the wire/ the stronger the magnetic field is

Question 3

when using the right hand rule what does the thumb represent?

Answer 3

thumb - direction the current is flowing

Question 4

What are the steps to the right hand rule?

Answer 4

point your thumb in the way the current is flowing and curve your hand as if into a fist, the way your fingers point is the way the magnetic field points

Question 5

what is an electromagnet?

Answer 5

a coil with an iron core

Question 6

name two characteristics of an electromagnet

Answer 6

they can be turned on and off
the direction of the magnetic field can change by reversing the way the current is flowing

Question 7

name 4 ways to increase an electromagnet’s strength

Answer 7

increase the amount of turns
decrease the length and maintain the amount of turns
increase the current
add an iron core

Question 8

why does increasing an iron core increase the strength of an electromagnet?

Answer 8

iron is a magnetic material so when it’s surrounded by an electromagnet it becomes magnetized