A current of 5 ampere is flowing in a wire of length 1.5 metres. A force of `7.5 N` acts on it when it is placed in a uniform magnetic field of 2 Tesla. The angle between the magnetic field and the direction of the current is

Options

A. `30^(@)`
B. `45^(@)`
C. `60^(@)`
D. `90^(@)`

Answer

A

Explanation

`F = I l B sin theta implies sin theta = (7.5)/(5 xx 1.5 xx 2) = 0.5 = theta = 30^(@)`