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प्रश्न
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संबंधित प्रश्न
State three differences between the primary and secondary cells.
Name the instrument used to control the current in an electric circuit.
'The resistance of a wire is 1 ohm'. Explain the meaning of this statement.
There is a positively charged sphere A and negatively charged sphere B, such that they are brought in electrical contact by a copper wire.
Which sphere is at lower potential before electrical contact on the basis of convention?
State the relation between electric current; the number of electrons moving in a circuit and time in seconds.
What do you understand by the term electric resistance?
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?
