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- #National Eligilibility Cum Entrance Test
- #Magnetic Effects of Current and Magnetism
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- #Physics
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A disc of mass m has a charge Q distributed on its surface. It is rotating about an axis LL' with an angular velocity . What is the force acting on the disc if the magnetic field is B?
Option: 1
Zero
Option: 2
RB
Option: 3
2RQB
Option: 4
None
Answers (1)
Since all the current forms closed loops in the uniform magnetic field, the force acting on the disc is zero.
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