Magnetic field Q
Original post by Meessh123
You should know a formula for the force on the wire F=BLI
Divide that force by the number of electrons in the wire.
The number in the wire is found from multiplying the number given per unit volume by the volume of the wire.
Volume of wire is length x cross section
Do the maths and you will get the required answer.
There is another, slightly quicker, way of doing this as others may suggest.
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(edited 9 years ago)
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