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The bulb glows because the filaments get heated up due to current and lights up. • The bulb work on the principle that when a metal is heated it starts emitting light at some point.is turned on • When the switch is turned, an electric current is passed through • When an electric current is passed through a conductor it generates heat, H = IR2t (Joule's equation), where I is the current, R is the resistance of the conductor and t is the time for which current is passed. • This heat is used by the atomic electrons to get excited to higher energy levels from the ground state. • When these electrons return back to their ground state, a light photon is emitted, and this is how a bulb glows.
In the questions given below, there are three statements followed by three conclusions I, II and III. You have to take the three given statements to be ...
If it was Sunday on 1st April, 1956, then what was the day of the week on 2nd July, 1957?
A, B, C, D, E, F, G, and H are sitting around a square table facing outwards. Some of them are sitting at the corners while some are sitting at the exac...
Statements:
Some telescopes are periscopes.
Some telescopes are microscopes.
Some telescopes are kaleidoscopes.
Conclusio...
In a certain code language ‘AILMENT’ is written as ‘MJBMUOF’ and ‘MERCY’ is written as ‘FNRZD’. How is ‘LIGHT’ written in that cod...
Seven girls Kiran, Lina, Mina, Nina, Oshi, Pinki and Qizma are sitting in a straight line facing the same direction. Four girls are sitting between Qizm...
Who lives on 4TH floor?
If F = 6 and TRIAL = 60, then OBVIOUS =
What number should come next in the series 2, 1, ½, ¼, __?
In a code language, ‘hills are beautiful’ is written as ‘146’, ‘beautiful is places’ is written as ‘472’, and ‘places are greenery’ ...
