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Question

A particle of charge q and mass m moves in a clockwise circular path of radius r in a uniform magnetic field B at a speed v. The particle is replaced with a particle of identical mass and charge q, moving at speed v.
The radius and direction of the new circular path the particle makes is:

A
12r, clockwise
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B
12r, counter-clockwise
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C
r, clockwise
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D
r, counter-clockwise
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E
2r clockwise
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