A thin ring of 
radius carries a uniformly distributed charge. The ring rotates at a constant angular speed of 
about its axis, perpendicular to its plane. If the magnetic field at its centre is 
then the charge carried by the ring is close to 
.
A
B
C
D
Text Solution
Verified by ExpertsThe correct answer is:
B
JEE Main 2019
If 
is the charge on the ring, then
Magnetic field,
or 
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