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प्रश्न
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उत्तर
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संबंधित प्रश्न
State and define the S.I. unit of resistance.
State three factors on which the resistance of a wire depends. Explain how the resistance depends on the factors stated by you.
There is a positively charged sphere A and negatively charged sphere B, such that they are brought in electrical contact by a copper wire.
In which direction electronic current flows?
State the relation between electric current; the number of electrons moving in a circuit and time in seconds.
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 SI unit of resistance?
