Question

What is the unit of electric work? Define it in relation to quantity of charge and potential difference.​

Answer 1

Explanation:

Electric Potential: The amount of electric potential energy at a point is called electric potential.

Electric Potential difference: The difference in the amount of electric potential energy between two points in an electric circuit is called ELECTRIC POTENTIAL DIFFERENCE.

Electric potential difference is known as voltage, which is equal to the work done per unit charge to move the charge between two points against static electric field.

Therefore;

Voltage

=

Work done

Charge

Voltage or electric potential difference is denoted by ‘V’. Therefore;

V

=

W

Q

-----------(1)

Where, W = work done and Q = Charge

SI unit of electric potential difference (Voltage):

SI unit of electric potential difference is volt and denoted by ‘V’. This is named in honour of Italian Physicist Alessandro Volta.

V

=

Joule

Coulomb

=

J

C

Or,

V

=

J

C

−

1

Since joule is the unit of work and coulomb is the unit of charge; 1 volt of electric potential difference is equal to the 1 joule of work to be done to move a charge of 1 coulomb from one point to another in an electric circuit. Therefore,

1

V

=

1

Joule

1

Coulomb

=

1

J

1

C

Voltmeter: An apparatus to