Question

give rason.. circuit start working only when electric cell connected
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Answer 1

because cell is source of potential difference. it is source of charge.

Answer 2

Answer :-

• circuit start working only when electric cell connected because cell provide potential difference (external force)

• potential difference force electrons to move from higher potential to lower potential across the ends of the conductor.

• the electric potential energy per unit charge is called electric potential

• electric potential = electric potential energy / charge

• so for providing potential difference across the ends of the conductor we use battery or cell.