Question

Assertion (A): The energy of a charged particle moving in a magnetic field does not change.

Reason (R): It is because the work done by the magnetic force on the charge moving in a magnetic field is zero.

Options

• If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).

• If both Assertion (A) and Reason (R) are true and Reason (R) is not the correct explanation of Assertion (A).

• If Assertion (A) is true but Reason (R) is false.

• If both Assertion (A) and Reason (R) are false.

Answer 1

If both Assertion (A) and Reason (R) are true and Reason (R) is correct explanation of Assertion (A).

Explanation:

As the velocity and applied magnetic field are perpendicular, the work done by a magnetic force on a charge in a magnetic field is zero. This signifies that the particle's energy remains constant. Both the statement and reason are true, and reason accurately explains the assertion.