Question

14. A flat dielectric disc of radius R carries
an excess charge on its surface. The
surface charge density is o. "The disc
rotates about an axis perpendicular to
its plane passing through the centre
with angular velocity w. Find the
magnitude of the torque on the disc if
it is placed in a uniform magnetic field
whose strength is B which is directed
perpendicular to the axis of rotation
1
(a) ΞσωπBR
4.
(b) 50
σωπBR
(c) -O0ABR
4.
(a)? ownBR
4​

Answer 1

Answer:

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Explanation:

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