Question

Assertion : A current carrying conductor experiences a force in a magnetic field.
Reason : The net charge on a current carrying conductor is zero.
(A) Both Assertion and Reason are correct and reason is the correct explanation for Assertion
(B) Both Assertion and Reason are correct and reason is not the correct explanation for Assertion
(C) Assertion is correct but Reason is incorrect
(D) Both assertion and Reason are incorrect

Answer 1

Hint :In order to answer this question, we need to understand that the current in the conductor is due to the motion of free electrons in a definite direction. When such a conductor/wire is placed in the magnetic field, each electron moving in this field experiences a force. Thus, the current-carrying wire/conductor experiences a force in the magnetic field.

Complete Step By Step Answer:
A stationary charge produces an electric field around it while flow of charge or current produces a magnetic field around it. (The direction of the magnetic field around a current carrying wire is given by the Right hand thumb rule.) Experimentally, it is observed that when a current carrying conductor is placed in an external magnetic field then the conductor experiences a force.
The direction of this magnetic force is directly dependent on:
(1). Direction of current flowing through the conductor
(2). Direction of external magnetic field
When a current carrying conductor having no net charge is placed in a magnetic field, the free electrons of the conductors move towards the positive end of the conductor with the same drift velocity, hence a magnetic force acts on them. The positive ions of the conductor being stationary, do not experience any magnetic field.
Hence, the correct option is (B).

Note :
It should be remembered that the given statement has an alternative concept. For this, we must know that a current carrying conductor acts as a magnet. When a magnet is placed in a magnetic field, the magnet experiences a magnetic force. Therefore, a current carrying conductor will also experience a magnetic force, since it acts as a magnet.