CUET · PHYSICS · PYQ PAPER 2025
In a magnetic field,
(A) a charged particle in motion can experience a force
(B) a charged particle at rest, experiences a force
(C) there is no change in the speed of the charged particle
(D) there is a change in the kinetic energy of the charged particle.
Choose the correct answer from the options given below:
- A (A), (B) and (D) only
- B (A) and (C) only
- C (A), (B), and (C) only
- D (B), (C) and (D) only
Answer & Solution
Correct Answer
(B) (A) and (C) only
Step-by-step Solution
Detailed explanation
(A) \( \vec{F} = q(\vec{v} \times \vec{B}) \). For \( \vec{v} \ne 0 \), \( F \ne 0 \) is possible. True. (B) For \( \vec{v} = 0 \), \( \vec{F} = 0 \). False. (C) Magnetic force is perpendicular to velocity \( (\vec{F} \perp \vec{v}) \). Work done \( W = 0 \). Thus…
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