A wire 1 m long is kept perpendicular to a magnetic field of `0.01` tesla.
(i) What is the forde on the wire when it carries a current of 10A ?
(ii) What is the force on the wire if it is parallel to the magnetic field ?

Options

A. `0.2 N, 0.1N`
B. `0,0.1N`
C. ` 0.1 N ,` zero
D. `0.5 N, 0.2N`

Answer

C

Explanation

`L=1m, theta =90^(@) , B =0.01T =10^(-2) T, I =10A`
`F =BIL sin theta =10^(-2) xx10xx1 xx sin 90^(@)`
`therefore F =0.1N`
When the conductor is kept parallel to the field,
`theta 0^(@) and F =0`