A particle of charge q and mass m starts moving from origin under the action of an electric field E Ei and B Boi with velocity v

Question

A particle of charge q and mass m starts moving from origin under the action of an electric field E Ei and B Boi with velocity v v The time after which its speed becomes 2v is 1 2 3 4 2mvo qEo 2B 9 mvo 3 Boq mvo 3 mvo

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