A rectangular loop of area A, carrying current I, is placed in a uniform magnetic field B. With the help of a suitable diagram, derive an expression,…

A rectangular loop of area $\displaystyle \vec{A}$, carrying current I, is placed in a uniform magnetic field $\displaystyle \overrightarrow{\mathrm{B}}$. With the help of a suitable diagram, derive an expression, in vector form, for the torque acting on the loop.