Question

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

• A. Directly proportional to $I$
• B. Directly proportional to $R$
• C. Directly proportional to $R^2$
• D. $Zero$

Answer 1

The correct option is D

$Zero$

Step 1 : Given data

Radius of circular loop$=R$

$I$ lies in $X-Y$ plane origin is its centre

Step 2 : Total magnetic flux through X-Y plane

A circular loop behaves like a dipole with one surface north pole and one surface is south pole . Since here total flux entering equals the total flux leaving and hence net flux equals to zero .

Hence total magnetic flux through $X-Y$plane $Zero$

The correct answer is Option D