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NEET Sample Paper NEET Sample Test Paper-27

  • question_answer
    To luminous flux from a 100 watt electric lamp is 6830 lumen. What is the efficiency of the lamp?

    A)  1%                 

    B)  5%

    C)  10%            

    D)  50%

    Correct Answer: C

    Solution :

    Given, output energy \[=\frac{6830}{683}\] watt = 10 watt Input energy = 100 watt Efficiency \[\eta =\frac{Output}{Input}\] \[\Rightarrow \]            \[\eta =\frac{10}{100}\times 100=10%\]    


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