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प्रश्न
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संबंधित प्रश्न
Name the instrument used to control the current in an electric circuit.
How are the potential difference (V), current (l) and resistance (R) related?
State three factors on which the resistance of a wire depends. Explain how the resistance depends on the factors stated by you.
What do you understand by the term electric potential?
State SI unit of electric charge and define it.
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 do you mean by the potential difference? Write its SI unit.
State three factors on which the resistance of a wire depends. Explain, how does the resistance depend on the factors stated by you.
