The component labelled J included in the circuit to change the potential difference.
What is a circuit ?
A circuit in electronics is a complete circular channel via which electricity flows. A current source, conductors, and a load make up a straightforward circuit. In a broad sense, the word "circuit" can refer to any permanent path through which electricity, data, or a signal can pass.
What are potential and how do they differ?
Potential difference is the potential formed while transferring a charge from one point in the field to another. Electric potential is the work done per unit charge to move a charge from infinity to a point in an electric field. At some time, it is defined. It is enclosed by two points.
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