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प्रश्न
What do you understand by the term electric potential?
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उत्तर
Electric potential: The amount of work done in moving a unit positive charge from infinity to a given point in an electric field is called electric potential.
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संबंधित प्रश्न
(a) Complete the circuit given in Fig. by inserting between the terminals A and C. an ammeter.
(b) In the diagram, mark the polarity at the terminals of ammeter and indicate clearly the direction of flow of current in the circuit when the circuit is complete.
(c) Name and state the purpose of Rh in the circuit.
A current 0.2 A flows in a wire of resistance 15Ω. Find the potential difference across the ends of the wire.
A charge of 8860 C flows through an electric circuit in 2 min and 40 s. Calculate the magnitude of current in a circuit.
What do you understand by the term electric resistance?
Draw a diagram showing two bulbs connected in series to a dry cell.
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?
State three factors on which the resistance of a wire depends. Explain, how does the resistance depend on the factors stated by you.
