1.

A cylindrical capacitor with external radius R, internal radius R-d(dltltR ), length l and mass M hangs on an insulating cord in a region where there is a homogenous, vertical magnetic field of strength B. It can rotate freely as a whole around its vertical axis, but is constrained, so that it can not move horizontally. The capacitor is charged and there is a voltage difference If without being mechaically disturbed, the capacitor is discharged through an internal radial wire then find maximum angular velocity of capacitor

Answer»

`(piin_(0)VBL)/(M)`
` (2piin_(0)VBl)/(M)`
`(3piin_(0)VBL)/(M)`
`(4piin_(0)VBL)/(M)`

ANSWER :B


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