Arod ofmass m lengthl can rotate without friction about the centre ofa verticalring . There is a unifrommafgnetic filedB intotheplane of the ring. Avariableemf epsilon is applied between thecentreand the rotating end of the rod . Caulcate the current whichkeeps the rod rotatingwithunifrom speed omega and theemfrequried to maintain therequiredcurrent

Arod ofmass m lengthl can rotate without friction about the centre ofa

1.	Arod ofmass m lengthl can rotate without friction about the centre ofa verticalring . There is a unifrommafgnetic filedB intotheplane of the ring. Avariableemf epsilon is applied between thecentreand the rotating end of the rod . Caulcate the current whichkeeps the rod rotatingwithunifrom speed omega and theemfrequried to maintain therequiredcurrent
Answer» Answer :`i=(mg cos omega t)/(BL), epsi=(1)/(2)Bomegal^(2)+(mg R COSOMEGAT)/(Bl)`

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