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प्रश्न
Why does the filament of an electric bulb in an electric circuit get white-hot, but not the connecting wires?
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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.
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संबंधित प्रश्न
A charge 0.5 C passes through a cross section of a conductor in 5 s . Find the current .
Explain the concept of electric potential difference in terms of work done in transferring the charge.
Name the physical quantitiy of which the unit is ampere
What do you understand by the term electric current?
Write SI unit of
Resistance.
