Advertisements
Advertisements
प्रश्न
State the unit of electric potential and define it.
Advertisements
उत्तर
Volt is the SI unit of electric potential.
One volt: When one coulomb of charge is brought from infinity to a given point in an electric field, such that work done is one joule, then the electric potential is said to be one volt.
OR
Electric potential is said to be one volt if one Joule of work is done in moving one coulomb of charge from infinity to a given point in an electric field.
APPEARS IN
संबंधित प्रश्न
What is an electric cell?
A cell of potential difference 12 V is connected to a bulb. The resistance of filament of bulb when it glows is 24Ω. Find the current drawn from the cell.
Assuming that the charges of an electron is 1.6 × 10-19 coulombs, the number of electrons passing through a section of wire per sec, when the wire carries a current of one ampere is:
Why does the filament of an electric bulb in an electric circuit get white-hot, but not the connecting wires?
What do you understand by the term series circuit?
State two characteristics of resistance in the parallel circuit.
The following figure shows a metal rod PQ mounted on an insulated stand. The cap of an uncharged electroscope touches one end Q of the metal rod. A negatively charged ebonite rod is brought near the other end P of the metal rod.

(a) What charge does the end P have?
(b) What charge does the end Q have?
(c) What charge does the cap of the electroscope have?
(d) What charge does the gold leaf have?
(e) Will the leaf diverge or collapse? Give reason.
(f) If the electroscope is now earthed, what charge does the metal rod have?
'The resistance of a wire is 2 ohm'. Explain the meaning of this statement.
