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A small bead of mass m carrying charge q. The bead can freely move on the smooth fixed ring placed on a smooth horizontal plane. In the same plane a charge +Q has also been fixed as shown. The potential atthe point P due to +Q is V. The velocity with which the bead should projected from the point P so that it can complete a circle should be greater than Please give detailed answer !!!!!!

A small bead of mass m carrying charge q. The bead can freely move on the smooth fixed ring placed on a smooth horizontal plane. In the same plane a charge +Q has also been fixed as shown. The potential atthe point P due to +Q is V. The velocity with which the bead should projected from the point P so that it can complete a circle should be greater than
 
Please give detailed answer !!!!!!

Grade:12

1 Answers

Arun
25758 Points
4 years ago
 
this is an easy but little tricky ques BUT WE CAN SOLVE IT EASILY.....
potential at B is 3V.....To complete the circle....
therefore
1/2mv2= 3Vq
v2=(6Vq)/m

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