Question

If an electron of velocity $(2\hat{i}+3\hat{j})$ is subjected to magnetic field of $4\hat{k}$, then its :-
(a) path will change
(b) speed does not change
(c) path must be circular
(d) momentum is constant

• A. a , b
• B. All
• C. a , b , c
• D. None

Answer 1

Answer: (C)

As velocity perpendicular $B$, so electron perform uniform circular motion.