Question

The torque acting on the loop as shown in the figure is :

• A. $2\times {10}^{-2}$ N-m along $-$ x axis
• B. $2\times {10}^{-2}$ N-m along $+$ x axis
• C. $2\times {10}^{-2}$ N-m along $+$ y axis
• D. $2\times {10}^{-2}$ N-m along $-$ y axis

Answer 1

Answer: (A)

$2\times {10}^{-2}$ N-m along $-$ x axis

Torque on the loop is,
$\tau =NBAI\sin \theta$
$=1\times 10\times 0.4\times 50\times {10}^{-4}\times \sin {90}^{\circ }$
$=2\times {10}^{-2}$N-m along $-x$ axis