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MGIMS WARDHA MGIMS WARDHA Solved Paper-2006

  • question_answer
    If percentage change in current through a resistor is 1%, then the change in power through it would be :

    A) 1%                                         

    B) 2%

    C) 1.7%                                     

    D) 0.5%

    Correct Answer: B

    Solution :

    Power \[P=iR\] \[\therefore \]  \[\frac{\Delta P}{P}\times 100=2\frac{\Delta i}{i}\times 100+\frac{\Delta R}{R}\times 100\]                                 \[=2\times 1%+0\] \[=2%\]


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