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

Options

A. `(piin_(0)VBl)/(M)`
B. ` (2piin_(0)VBl)/(M)`
C. `(3piin_(0)VBL)/(M)`
D. `(4piin_(0)VBL)/(M)`

Answer

B