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Class 12 › Physics › Moving Charges and Magnetism
CBSE2022Class Class 12 · Physics1 Marks · Mcq✅ Verified
A charged particle is projected along the axis of a current-carrying loop. Which of the following statements is true?
A. The acceleration depends on the velocity of projection
B. The acceleration depends on the magnitude of current in the coil
C. The acceleration depends on the radius of the coil
D. The charged particle will move with constant velocity
✅ Answer & Solution
✅ Correct Answer: D
When a charged particle moves along the axis of a current-carrying loop, its velocity is parallel to the magnetic field $\vec{B}$ on the axis.
Magnetic force: $F = qvB\sin\theta = qvB\sin 0° = 0$
No magnetic force acts on the particle. Hence it moves with constant velocity.
