Question

how potential difference set when we connect battery​

Answer 1

Answer:

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It amounts to the same thing, because the flow of positive charge in one direction is equivalent to the flow of negative charge in the opposite direction. When a battery or power supply sets up a difference in potential between two parts of a wire, an electric field is created and the electrons respond to that field.

Explanation:

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Answer 2

Answer:

When a battery or power supply sets up a difference in potential between two parts of a wire, an electric field is created and the electrons respond to that field.