Electrical Potential & Potential Difference

Electrical potential

• It is defined as the work done in bringing a unit positive charge from infinity to a particular point in the electric field.

      Electric field = work done / Electric charge

• The unit of work done is joule and charge is coulomb. 
• The unit of electrical potential is joule per coulomb.
• One volt = one joule per coulomb

Potential difference

• The electric potential difference between any two point A and B in an electrical field is equal to work done to move a unit positive charge from point A to point B against the electric force due to electric field.
• Potential difference = Work done / Charge
• If the potential at point A is V_A and that of potential of point B is V_B, the potential difference between point A and B

       = Potential of final point B – Potential of initial point A

       = V_B – V_A

       = W / Q

• Let V_B – V_A = V

Unit of Potential difference

• The SI unit of potential difference is volt or Joule per Coulomb.

You may also like :

What do you mean by rectifier efficiency and power efficiency?

What is drift and drift velocity?

What do you mean by diffusion?

Explain : Harmonic Resonance