In which case will the particle move in a straight line with constant velocity?

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(II) (iii) (S)

(III) (iii) (P)

(IV) (i) (S)

(III) (ii) (R)

answer is A.

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Detailed Solution

When F→m+F→E=0, the electron moves with constant velocity along y-axis.qVyB0=qE0⇒qE0B0B0=qE0∴Fnet=0Vy remains constant.

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