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प्रश्न
Write symbol and state function of following component in an electric circuit :
voltmeter
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उत्तर
Voltmeter : 
;
It is used to measure the potential difference between two points of a circuit.
संबंधित प्रश्न
Name the instrument used to control the current in an electric circuit.
Name the physical quantity of which the unit is ohm
State the relation between electric current; the number of electrons moving in a circuit and time in seconds.
A charge of 8860 C flows through an electric circuit in 2 min and 40 s. Calculate the magnitude of current in a 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?
Write SI unit of
Resistance.
Is electric current a scalar quantity?
'The resistance of a wire is 2 ohm'. Explain the meaning of this statement.
