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प्रश्न
Select the correct option:
In a metallic conductor, electric current is thought to be due to movement of:
पर्याय
ions
amperes
electrons
protons
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उत्तर
electrons
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संबंधित प्रश्न
Name the instrument used to control the current in an electric circuit.
What is the function of a key (or switch) in an electric circuit?
Write symbol and state function of following component in an electric circuit : key
Explain the concept of electric potential difference in terms of work done in transferring the charge.
How electric current flows in solids?
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 function of a switch in an electric circuit?
A wire of resistance 1 Ω is stretched to double its length. What will happen to the resistance of the stretched wire?
