Question

what is electric potential difference name the device used tomeasure the electric potential difference and also draw neat and

Answer 1

Potential difference is the difference of potentials to maintain at the ends of a circuit due to which charges move and hence current set up in the circuit.

Voltmeter is a device which measure the potential difference across a circuit or an appliance. Potential difference is set up by a battery(which is combination of cells) or a cell.