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At a point on the Earth’s surface the magnetic field has a horizontal component due north...

At a point on the Earth’s surface the magnetic field has a horizontal component due north of 1.8 ́ 10-5 T and a vertical component downwards of 5.5 ́ 10-5 T.

(i) Draw a diagram.

(ii) Calculate the force on a 1.5 m length of wire carrying a current of 13 A when the wire is held vertically with the current flowing downwards.

(iii) Calculate the force when the wire is horizontal with the current flowing west to east.

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