A positive charge particle with charge q...

A positive charge particle with charge q is moving with speed v in a region of uniform magnetic field B at the instant shown in figure. An external electric field so to be applied so that the charged particle follows a straight line path. The magnitude and direction of electric field required are respectively.

qvB, +y axis

qvB, -y axis

vB, -y axis

`(vB)/q,` -x axis

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