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प्रश्न
State the factors on which the electrical resistance of a wire depends.
उत्तर
The electric resistance of the wire depends on the following factors :
(i)The length of the wire.
(ii)The area of cross-section of the wire.
(iii)The temperature of the wire.
(iv)The material of the wire.
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संबंधित प्रश्न
Explain the concept of electric potential difference in terms of work done in transferring the charge.
Define the term potential difference.
What do you understand by the term parallel circuit?
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?
A wire of resistance 1 Ω is stretched to double its length. What will happen to the resistance of the stretched wire?
Explain the following:
Potential difference
