Advertisements
Advertisements
प्रश्न
Why does the filament of an electric bulb in an electric circuit get white-hot, but not the connecting wires?
उत्तर
The filament of an electric bulb is made up of tungsten having high resistance. Due to its high resistance, on passing an electric current through it, electrical energy changes into heat energy. So much heat is produced that filament of bulb becomes white-hot and gives light.
The resistance of connecting wires is very low and hence the connecting wires do not get heated.
APPEARS IN
संबंधित प्रश्न
Name the physical quantity of which the unit is ohm
Select the correct option:
In a metallic conductor, electric current is thought to be due to movement of:
What do you understand by the term parallel circuit?
Draw a diagram showing two bulbs connected in parallel to a dry cell.
A wire of resistance 1 Ω is stretched to double its length. What will happen to the resistance of the stretched wire?
