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NEET
Exam
NEET
Subject
Physics
Chapter
Magnetic Effects of Current

NEET · Physics · Magnetic Effects of Current

Given below are two statements : One is labelled as Assertion (A)...

Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).

Assertion (A) : In an uniform magnetic field, speed and energy remains the same for a moving charged particle.

Reason (R): Moving charged particle experiences magnetic force perpendicular to its direction of motion.

Options

  1. ABoth Assertion and Reason are true and Reason is the correct explanation of Assertion.
  2. BBoth Assertion and Reason are true but Reason is NOT the correct explanation of Assertion.
  3. CAssertion is true but Reason is false.
  4. DAssertion is false but Reason is true.

Correct answer

A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion.

Step-by-step solution

The force experienced by the charge particle is perpendicular to the instantaneous velocity at all instants as F→=q(v→×B→)\overset{\to}{F} = q\left(\overset{\to}{v} \times \overset{\to}{B}\right).

Hence, the magnetic force cannot bring any change in the speed of the charged particle. Since, the speed remains constant, the kinetic energy also remains constant.

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