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A charge q is accelerated through a pote...

A charge q is accelerated through a potential difference V . It is then passed normally through a uniform magnetic field , where it moves in a circle of radius r . The potential difference required to move it in a circle of radius 2 r is

A

2 V

B

4 V

C

1 V

D

3 V

Text Solution

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The correct Answer is:
B
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