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An uniform electric field of strength E ...

An uniform electric field of strength `E` exists in a region. An electron of mass `m` enters a point A perpendicular to x - axis with velocity `V`. It moves through the electric field and exists at point `B`. The components of velocity at `B` are shown in (Fig. 3.156). At `B` the y - component of velocity remain uncharged.

Find the rate of work done by the field at `B`.

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