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प्रश्न
State and define the SI unit of electric current.
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उत्तर
Ampere (A) is the SI unit of electric current.
One ampere: When one coulomb charge flows through an electric circuit in one second, then the electric current flowing the circuit is said to be ampere.
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संबंधित प्रश्न
State SI unit of electric charge and define it.
State two characteristics of resistance in the 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?
What amount of work is required in moving 3 C charge through a potential difference of 6 V?
