Question

A circular current loop is shown in the adjacent figure. The magnetic field in the region is along $x$-axis and its magnitude in the space is increasing with increasing $y$-coordinate. The net magnetic force on the loop is


(correct answer + 2, wrong answer - 0.50)

• A. along $+z$-axis
• B. along $-z$-axis
• C. along $+y$-axis
• D. None of these

Answer 1

The correct option is D None of these


Considering $\overrightarrow{dl}$ at angle $\theta$ symmetrically as shown. $dF$ on either side have same magnitude but opposite directions.
$\therefore$ Both $dF$ get cancel out, and net force on the loop is zero