Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Moving Charges and Magnetism

Question:

A current carrying circular loop of radius R is placed in the x-y plane with centre at the origin. Half of the loop with x > 0 is now bent so that it now lies in the y-z plane.

Options:

 The magnitude of magnetic moment now diminishes.

 The magnetic moment does not change.

 The magnitude of B at (0.0.z), z >>R increases.

 The magnitude of B at (0.0.z), z >>R is unchanged.

Correct Answer:

 The magnitude of magnetic moment now diminishes.

Explanation:

Magnetic Moment \(\mu\) = I A

As A has now changed, magnetic moment changes.