Question

A circular loop of radius $R$, carrying current $I$, lies in $x-y$ plane with its centre at origin. The total magnetic flux through $x-y$ plane is

• A. Zero
• B. Inversely proportional to $R$
• C. Directly proportional to $R$
• D. Directly proportional to $I$

Answer 1

The correct option is A Zero

Total magnetic flux passing through the whole of the $x-$y plane will be zero, because magnetic lines form a closed loop. So, as many lines will move in $+z$ direction, the same will return to $-z$ direction from the $x-y$ plane.


Hence, option $\left(\text{D}\right)$ is the right.