What is meant by electric circuit ? Why does electric current start flowing in a circuit the moment circuit is complete ? When do we say that the potential difference across a conductorin a circuit is 1 volt ? Calculate the potential difference between the two terminals of a battery if 12 joules of work is donein transferring 2 coulombs of charge.

What is meant by electric circuit ? Why does electric current start fl

1.	What is meant by electric circuit ? Why does electric current start flowing in a circuit the moment circuit is complete ? When do we say that the potential difference across a conductorin a circuit is 1 volt ? Calculate the potential difference between the two terminals of a battery if 12 joules of work is donein transferring 2 coulombs of charge.
Answer» Solution :`` A CONTINUOUS conducting path CONSISTING of wire and other resistances (like electric bulb, etc.) and a switch, between the two terminals of a cell or a battery along which an electric current flows is called an electric circuit. `` It is the potential difference between the ends of the wirewhich makes the electric CHARGES (or current) to flow in the wire. The potential difference between two points is said to be 1 volt if 1 joule of work is done in moving 1 COULOMB of electric charge from one point to another. Thus, 1 volt `=(1 "joule")/(1 "coulomb") "" or ""` 1 volt `=(1J)/(1C)` or 1 J/C `* V=?""W=12 J ""Q=2C` Now, `V=(W)/(Q)=(12J)/(2C)=6` volts