Which pole does the magnetic current come out of in a bar magnet?
The North pole to the South pole.
5 of 15
How can you magnetise a magnetic material in 3 different ways?
1. Stroke it with a known magnet 2. Hold it in a magnets magnetic field and hit it with a hammer. 3. Put it in a magnets magnetic field.
6 of 15
How can you make an electro magnet stronger in 3 different was?
1. Increase the turns of wire 2. Increase the electric current 3.Get a softer core
7 of 15
How do you demagnetise a magnet?
Hit it with a hammer, not in a magnets magnetic field.
8 of 15
What shape is an electromagnets magnetic field?
It is circular
9 of 15
Why are non renewable fuels are better than renewable fuels?
Because, you have what you have you dont have to hope its a windy day therefor, they are more relaible.
10 of 15
What happens which is bad for the enviroment when we burn fossil fuels?
When we burn fossil fuels carbon dioxide is produced wjich adds to the earths blanket and causes global warming.
11 of 15
What happens when a magnet is placed near to a magnetic material?
It attracts
12 of 15
What couldhappen when two magnets are brought close together?
They can either attract or repel each other.
13 of 15
What are some examples of how an electromagnet is used?
Electric bell, Relay circuit, Circuit breaker, Maglev trains
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What happens to the electromagnets magnetic field when the direction of the current is reversed?
Its poles switch place e.g if the north pole was at the top and the south pole was at the bottom then we changed the direction of current the north pole would be at the bottom and the south pole would be at the top
15 of 15
Other cards in this set
Card 2
Front
What fuels are used in power stations?
Back
Coal, Oil, Gas
Card 3
Front
What are some non renewable fuels?
Back
Card 4
Front
What are some renewable fuels?
Back
Card 5
Front
Which pole does the magnetic current come out of in a bar magnet?
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