Question

What is v, E and B are Mutually Perpendicular?

Answer

v, E and B are Mutually Perpendicular - In this situation, if E and B are such that as shown in figure, then the particle will pass through the field with same velocity. F = F_e + F_m = 0 i.e. a = (F/m) = 0 And in this situation, as /F_e/ = /F_m/ i.e. qE = qvB ⇒ v = E/B

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