A charged particle moves with velocity v→ = ai^+dj^ in a magnetic field B→ = Ai^+Dj^ the force acting on the particle has magnitude F

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F = 0 if aD = Ad

F = 0 if aD = –Ad

F = 0 if aA = –dD

F ∝ a2+d212×A2+D212

answer is A.

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Detailed Solution

F→ ∝ v→ ×B→ ∝ aD−Adk^

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