Advertisements
Advertisements
Question
Advertisements
Solution
APPEARS IN
RELATED QUESTIONS
What transformation of energy takes place when current is drawn from a cell?
n electrons flow through a cross section of a conductor in time t. If charge on an electron is e, then write an expression for the current in the conductor.
Name the instrument used to control the current in an electric circuit.
A cell is used to :
Explain the concept of electric potential difference in terms of work done in transferring the charge.
'The resistance of a wire is 1 ohm'. Explain the meaning of this statement.
A current 0.2 A flows in a wire of resistance 15Ω. Find the potential difference across the ends of the wire.
How many electrons constitute one unit electric charge in SI system?
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?
