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प्रश्न
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उत्तर
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संबंधित प्रश्न
Explain why does a metal wire when connected to a cell offer resistance to the flow of current.
Name the physical quantity of which the unit is volt
In transferring 1.5 C charge through a wire, 9 J of work is needed. Find the potential difference across the wire.
How electric current flows in liquids?
Select the correct option:
In a metallic conductor, electric current is thought to be due to movement of:
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 the factors on which the electrical resistance of a wire depends.
What is the SI unit of resistance?
