potential difference is defined as the work done in bringing an unit positive charge from infinity to a point.Are there any specific reasons for the charge to be positive?

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Solution

No, there is not any specific reason for taking positive charge . It is test charge only. You can take negative charge too.

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The electric potential at a point is the amount of work done in bringing a unit positive charge from infinity to that point.

We know that it is the electrons that move, so how is the potential defined as the work done to bring a POSITIVE CHARGE from infinity to a point?

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