Physics Moving Charge and Magnetism Force and Torque on a Current Carrying Conductor Single Correct MCQ
Published on: September 12, 2026

A metallic loop is placed in a magnetic field. If a current is passed through it, then

A
The ring will feel a force of attraction
B
The ring will feel a force of repulsion
C
It will move to and from about its center of gravity
D
None of these

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Text Solution

Verified by Experts
The correct answer is:
A
Step 1: When a current is passed through the metallic loop, it generates a magnetic field around itself, due to Ampere's law.
Step 2: According to the Lorentz force law, a current-carrying conductor experiences a force when it is placed in an external magnetic field. The direction of the force can be determined using the right-hand rule.
Step 3: If the external magnetic field is in a direction that interacts with the magnetic field produced by the current in the loop, a resultant force will act on the loop.
Step 4: This force can either be attractive or repulsive depending on the relative orientations of the magnetic field and the current. However, if we assume that the current is in the same direction of the external magnetic field, the loop will feel an attractive force towards the source of the magnetic field.
Therefore, the correct answer is A: The ring will feel a force of attraction.

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