A battery is a source of potential difference or electricity?If it is a source of potential difference then, actually do we make potential difference in power plants so,then from where electricity comes in wires?Is it the electrons of the conductor which move and our bulb glows?Explain potential difference and electricity.

Asked by Kumar Harshvardhan | 1st Jun, 2014, 02:12: PM

Expert Answer:

A battery is a source of electrons and positive ions which sets one of it's terminal (cathode) at negative potential and the other (anode) at positive potential. Hence a battery is a source of electricity(electrons) which sets a potential difference across the battery terminals. Inside the battery there is separation between the ions and electrons. The electrons have the tendency to combine with the positive ions in order to make the battery neutral. When the battery is connected to an external circuit, these electrons (from cathode) are drifted towards the positive terminal (anode) through the circuit.
Hence electrons tend to flow through a conductor only when there is a potential difference across it's ends. This flow of electrons is called electric current.
Yes, in power plants we are setting potential difference in order to make current flow from the genarating end to the load (our house).
Yes, the electrons flow through the bulb in order to glow the bulb.

Answered by Ravindra Kapal | 4th Jun, 2014, 05:51: PM