In a region of space, suppose there exists a uniform electric field E= 10i (V/m) If a positive charge moves with a velocity v=-2j, its potential energy at this moment.
(1) Increases
(2) Decreases
(3) Does not change
(4) Both (1) and (2)

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Solution

The correct option is (2) Decrease
According to the question, the electric field is in the positive x-direction
The movement of charge is in the negative y-direction.
The figure of the given situation

From the figure, we can see that due to the presence of the electric field the charge is deflected towards the lower potential.
Hence its potential energy would be decreased.

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In a region of space, suppose there exists a uniform electric field E= 10i (V/m) If a positive charge moves with a velocity v=-2j, its potential energy at this moment.(1) Increases (2) Decreases(3) Does not change (4) Both (1) and (2)

In a region of space, suppose there exists a uniform electric field E= 10i (V/m) If a positive charge moves with a velocity v=-2j, its potential energy at this moment.
(1) Increases
(2) Decreases
(3) Does not change
(4) Both (1) and (2)