WBJEE 2023 Physics & Chemistry Solved Paper

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Question : 80 of 80

Marks: +1, -0

A charged particle of charge q and mass m is placed at a distance 2R from the centre of a vertical cylindrical region of radius R where magnetic field varies as

→

B

=(4t2−2t+6)

^

k

, where t is time. Then which of the following statements is/are true?

Induced electric field lines form closed loops.
Electric field varies linearly with r if r<R, where r is the radial distance from the centerline of the cylinder.
The charged particle will move in clockwise direction when viewed from top.
Acceleration of the charged particle is ‌
7q
2m
when t=2 sec.

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