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The filament of a filament lamp is broken. It is rejoined and is lit again.a. What happens to the intensity of light from it? Describe the reason behind.b. Incandescent lamps are filled with nitrogen at low pressure. What is the advantage of doing so?c. You are given two filament lamps of resistance 75012 and 100012. Of these, which has more power? |
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Answer» a. Increases. Because resistance decreases and current increases when length decreasing. b. Nitrogen doesn’t expand over less change in temperature. At normal temperature it behave as a inert gas. It is plenty in atmosphere. c. 750 Ω |
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