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2015-06-09T21:11:41+05:30

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When the cyclist paddles the paddle the chain of the cycle moves and the dynamo which is connected to the paddle or the chain lights up the L.E.D. light.. The faster the wheel or chain moves the longer the L.E.D. bulb glows.


1 5 1
thanks arnav
ur welcoo bro
can u breif it
plz at least for 1 a4 size