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WBJEE 2023 Physics & Chemistry Solved Paper
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© examsnet.com
Question : 80
Total: 80
A charged particle of charge
q
and mass
m
is placed at a distance
2
R
from the centre of a vertical cylindrical region of radius
R
where magnetic field varies as
→
B
=
(
4
t
2
−
2
t
+
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
7
q
2
m
when
t
=
2
s
e
c
.
Validate
Solution:
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