Physics

Problem

A rectangular loop

ABCD

lies in the plane of the paper with

AB

at the top and carries a current

I

in the clockwise sense. A uniform magnetic field

\mathbf B

of constant magnitude is applied in the plane of the paper from left to right. (a) State the direction of magnetic force on each side

AB,\;BC,\;CD,

and

DA

. (b) Hence state whether the torque on the loop tends to rotate it clockwise or anticlockwise. a. (a) Direction of magnetic force on

AB,\;BC,\;CD

, and

DA

b. (b) Sense of resulting torque on the loop