Where is the strongest part of the magnetic field created by a bar magnet?
At the poles
What happens to the distance between magnetic field lines when the field gets stronger?
The field lines get closer together
A steel paper clip is brought into a magnetic field and attached to the end of a bar magnet. The paperclip now behaves as a magnet, what type of magnetism is this?
Induced magnetism
Why does a compass needle point north?
The needle is a magnet, the north pole of the needle is attracted to the south pole of the Earth
What does the Earth's magnetic field protect us from?
Solar winds
When the activity of the sun is high, charged particles from solar winds can flow along the earth's magnetic field lines and enter the atmosphere near the poles. What visual effect does this create?
The Aurora borealis (northern lights)
What will happen to the compass needles when a current flows through the wire?
The needles will line up with the magnetic field created by the current carrying wire
What happens to the strength of the magnetic field created by a current carrying wire as you get further from the wire?
The field gets weaker
Give one way you could increase the strength of the magnetic field created by this solenoid.
Increase the current / increase the number of turns / put an iron bar through the middle
What will happen when the bell switch is closed?
The electromagnet will attracted the iron armature which will ring the bell
