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संबंधित प्रश्न
What is the function of a key (or switch) in an electric circuit?
State and define the S.I. unit of resistance.
State Ohm’s law.
Name the physical quantity of which the unit is coulomb
There is a positively charged sphere A and negatively charged sphere B, such that they are brought in electrical contact by a copper wire.
What is the potential of the spheres after electrical contact?
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?
Label the different parts A, B, C, D, E, and F. State the functions of each part. Show in the diagram the direction of flow of current.
