A rectangular loop carrying a current i is placed in a uniform magnetic field B. The area enclosed by the loop is A. If there are n turns in the loop, the torque acting on the loop is given by

Options

A. `ni (hatA . hatB)`
B. `(nBA)/(i)`
C. `ni(A xx B)`
D. `(iBA)/(n)`

Answer

C

Explanation

When a current carrying coil is placed in a magentic filed , the coil experienced a torque given by
`tau = M xx B`
Where , M = magentic moment = niA
`therefore" " tau = ni (Axx B)`
Where , n = number of turns,
i= current flowing in coil
and A = area of coil .