Question

what is relation between 1joul and 1volt​

Answer 1

1 volt can be defined as 1 Joule per Coulomb i.e. V=W/Q.

To state in words, Electric Potential of a charge is the amount of work involved to move a unit of positive electric charge from an infinite position to a position against the intensity of the electric field of charge.

Electric Potential is calculated in Volts, Charge in Coulomb and work in Joule.