When the switch of the circuit is turned on, the filament of the bulb glows…
Physics · Class 12 · CBSE — Current Electricity
When the switch of the circuit is turned on, the filament of the bulb glows instantaneously because:
- the electrons coming from the power source move fast through the initially empty filament.
- the filament may be old having low resistance.
- electric field is established instantaneously across the filament which pushes the electrons.
- free electrons in the filament travel with the speed of light.
Answer
(C) electric field is established instantaneously across the filament which pushes the electrons.
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