Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
APPEARS IN
संबंधित प्रश्न
Write symbol and state function of following component in an electric circuit :
rheostat
State three factors on which the resistance of a wire depends. Explain how the resistance depends on the factors stated by you.
Define electric potential in terms of energy spent.
Select the correct option:
In a metallic conductor, electric current is thought to be due to movement of:
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?
What is the function of a switch in an electric circuit?
Is electric current a scalar quantity?
