If an electron moves in the direction of electric field, then

Its kinetic energy will decreases and potential energy will increase.

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Both kinetic energy and potential energy will increase.

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Both kinetic energy and potential energy will decrease.

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Kinetic energy will increase and potential energy will decrease.

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Solution

The correct option is A Its kinetic energy will decreases and potential energy will increase.

When the electron moves along the direction of E, due to the repulsive force, it undergoes retardation. Therefore, the kinetic energy decreases. As external work is done in moving the electron in this direction, its potential energy will increase.

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