Question

In the given figure, $P\&Q$ lie on $xz$ plane and $S\&T$ lie on $yz$ plane. The direction of magnetic moment of the loop carrying current $I$ is given by

• A. $\frac{\hat{i} + \hat{j}}{\sqrt{2}}$
• B. $-\left(\frac{\hat{i} + \hat{j}}{\sqrt{2}}\right)$
• C. $\frac{\hat{i} + \hat{k}}{\sqrt{2}}$
• D. $\frac{\hat{i} - \hat{k}}{\sqrt{2}}$

Answer 1

Answer: (B)

For $P Q R U$
$\vec{\mu}=-I a^2 \hat{\jmath}$
For RUTS
$\vec{\mu}=-I a^2 \hat{\imath}$
$\mu_{\text {net }}=-\frac{\hat{i}+\hat{j}}{\sqrt{2}}$