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Ask questions of CBSE Class X and discuss the same here. For any doubts relates to CBSE Class X.


Postby Apeksha » Fri Feb 20, 2009 2:33 pm

why does the bulb lights up as soon as we switch on the key?
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Joined: Thu Jan 22, 2009 10:11 am

Re: Electricity

Postby Shrestha » Mon Mar 23, 2009 9:56 pm

COZ light travels with a velocity of 300000 km/h.
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Joined: Thu Mar 12, 2009 7:05 pm

Re: Electricity

Postby pspoornima » Fri May 15, 2009 10:04 am

When we switch on the button, the circuit completes and as a result the electrons pass from the battery or any other AC power source and on reaching the filament the electric energy is converted into heat energy which inturn heats up the tungsten filament which in turn makes the filament glow and light gets on.
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Joined: Fri May 15, 2009 8:33 am

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