In the following figure two parallel metallic plates are maintained at different potentials. If an electron is released midway between the plates, it will move

Right ward at constant speed

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Left ward at constant speed

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Accelerates right ward

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Accelerates left ward

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Solution

The correct option is D Accelerates left ward
Electric field is directed right ward (higher potential of – 200 V to lower potential of – 400 V). When electron is left free in an electric field it accelerates opposite to the electric field. Hence in the given case electron accelerates to the left.

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