A laboratory magnet (see the figure) with a field B = 0.15 T over an effective a

Question

A laboratory magnet (see the figure) with a field B = 0.15 T over an effective area 10.0 cm in diameter exerts a force on a current-carrying wire that crosses between the pole faces at right angles to the field. The current in the wire is 13.0 A.

Part 1:
What is the magnitude of the force on the wire?

Part 2:
What is the direction of the force? (left, right, up, down, front, back)

A laboratory magnet (see the figure) with a field B = 0.15 T over an effective area 10.0 cm in diameter exerts a force on a current-carrying wire that crosses between the pole faces at right angles to the field. The current in the wire is 13.0 A. Magnet Part 1: What is the magnitude of the force on the wire? Part 2: What is the direction of the force? (left, right, up, down, front, back)

Explanation / Answer

Part 1:
Force = ilB Sin ()
Force = ilB                       [ As Sin (90o)=1]
Force = 13 x 0.1 x 0.15 Newton

Force = 0.195 Newton

Part 2:

Use Fleming's left hand rule, middle finger is direction of current, index finger as magnetic field ( from north to south pole) and direction of force will be shown by your thumb.

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