A current of `10` ampere is flowing in a wire of length `1.5m`. A force of `15 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

Focre on the wire `F=ilBsintheta`
`sintheta=(F)/(ilB)=(15)/(10xx15xx2)=(1)/(2)`
`:.` The angle between the magnetic field and direction of the current, `theta=30^(@)`.