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A bar is a permant magnet because its always magnetic - which has disad

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A bar is a permant magnet because its always magnetic - which has disad

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The right-hand rule shows the current going away from you 

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The right-hand rule shows the current going away from you 

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never cross
go to north to south
are continous
closer lines - stronger forces ( when drawing :) )

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You can use your right-hand thumb rule to work out which way the current and magnetic field are.

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You can use your right-hand thumb rule to work out which way the current and magnetic field are.

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strength of the magnetic field can vary 

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strength of the magnetic field can vary 

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- unlike bar magnets

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a wire wrapped into a col with a current running through it is known as a solenoid, it also has a magnetic field <333

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a wire wrapped into a col with a current running through it is known as a solenoid, it also has a magnetic field <333

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Electromagnetic Induction is the Induction of a potential difference in a wire which is experiencing a change in magnetic field.

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Electromagnetic Induction is the Induction of a potential difference in a wire which is experiencing a change in magnetic field.

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electromagnets can be turned on and off unlike a bar magnet

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electromagnets can be turned on and off unlike a bar magnet

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electromagnet is a coil of wire with a current running through it

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electromagnet is a coil of wire with a current running through it

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you can increase the strength of an electromagnet by adding a iron core, increasing the current or the number of coils

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you can increase the strength of an electromagnet by adding a iron core, increasing the current or the number of coils

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you cant see a magnetic field , but observe what effect it has around 

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you cant see a magnetic field , but observe what effect it has around 

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You can increase the strength of an electromagnet by increasing the current or increasing the number of coils.

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You can increase the strength of an electromagnet by increasing the current or increasing the number of coils.

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The magnetic field around an electromagnetic is just the same as the one around a bar magnet, but it can be reversed by reversing the current xoxo

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The magnetic field around an electromagnetic is just the same as the one around a bar magnet, but it can be reversed by reversing the current xoxo

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Can be increased by increasing the current, adding a iron core and adding more coils.

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Magnetic fields of electromagnets are produced by an electric current.

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Magnetic fields of electromagnets are produced by an electric current.