How does a bulb light up when the electric current is switched on?
Answers
Answer: When we switch on the light the electricity flows and it completes the circuit and the light glows/shines the bulb in a light is shaped like a ball with a pointed end inside the bulb there are inert gases which prevent the bulb from overheating and exploding. The two spikes which we see are made of metals like copper they act as electric conductors and pass the electricity to the small thin wire made of tungsten that is called the filament when electricity passes through this and it gets red hot and glows that’s how we get the light from the bulb. There are 2 openings in the bulb one at the side which acts as a cathode to pass electricity from the battery to the bulb and the another one is on the bottom of it which acts as an anode which passes electricity from the bulb to the battery to complete the circuit
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Answer:
The torch has a bulb that lights up when it is switched on. A torch contains a simple electric circuit. In a torch, two (or more) cells are connected to a torch bulb through a sliding switch.