Advertisements
Advertisements
प्रश्न
How is potential difference related to work done and quantity of charge?
Advertisements
उत्तर
If Q = Charge moving from one point to another in an electric field.
W = Work done to move the charge Q from one point to another.
V = Potential difference between two points.
Then work done in moving Q units of charge = W
Work done in moving one unit of charge = `"W"/"Q"`
But work done in moving one unit of charge = Potential difference = V
⇒ V = `"W"/"Q"`
APPEARS IN
संबंधित प्रश्न
Write symbol and state function of following component in an electric circuit :
ammeter
On increasing the resistance in a circuit, the current in it :
A current 0.2 A flows in a wire of resistance 15Ω. Find the potential difference across the ends of the wire.
State the relation between electric current; the number of electrons moving in a circuit and time in seconds.
What is the electrical potential at a point in an electric field when 24 J of work is done in moving a charge of 96 C from infinity?
Why does the filament of an electric bulb in an electric circuit get white-hot, but not the connecting wires?
What do you mean by an electric current?
Write SI unit of
Electric current,
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?
What is the physical meaning of resistance?
