Electro Magnetic Induction And Alternating Currents Question 313

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 [IIT-JEE 1999]

Options:

A) Directly proportional to I

B) Directly proportional to R

C) Directly proportional to $ R^{2} $

D) Zero

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Answer:

Correct Answer: D

Solution:

Circular loop behaves as a magnetic dipole whose one surface will be N-pole and another will be S-pole. Therefore magnetic lines a force emerges from N will meet at S. Hence total magnetic flux through x-y plane is zero.



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