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MGIMS WARDHA MGIMS WARDHA Solved Paper-2012

  • question_answer
    Intensity of a source of a 100 cd at a distance 2 m is

    A)  25 lux                                  

    B)  50 lux

    C)  75 lux                                  

    D)  150 lux

    Correct Answer: A

    Solution :

                    Intensity\[E=\frac{l}{{{r}^{2}}}\]\[=\frac{100}{{{(2)}^{2}}}=\frac{100}{4}=25\,lux\]


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