Calculate the magnitude of the magnetic force on a 270 m length of wire stretched between two towers and carrying a 150 A current. The Earth's magnetic field of 4.0×10−5 T makes an angle of 80 ∘ with the wire

Force on the wire is equal to 15.95 N    

Explanation:

We have given length of the wire l = 270 m

Current flowing in the wire i = 150 A

Magnetic field

Angle between magnetic field and wire

We have to find the force on the wire

Force on current carrying conductor is equal to

So

So force on the wire is equal to 15.95 N

wire in brush may conduct electricity from cell to drill and vice versa electrc shock possible

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