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Question

A particle of charge q and mass m initially at rest, starts moving from the origin under the action of an electric field E=E0^i and a magnetic field B=B0^i with velocity ¯v=v0^j . The speed of the particle will become 2v0 after a time


A
t=2mv0qE
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B
t=2Bqmv0
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C
t=3Bqmv0
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D
t=3mv0qE
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