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  3. RAJASTHAN PMT

RAJASTHAN PMT Rajasthan - PMT Solved Paper-1995

  • question_answer
    When 4 amp current flows through a motor then power consumed is 20 watt, and resultant potential difference is 220 volt. The applied e.m.f. is :

    A)  220 volt              

    B)                         225 volt

    C)         240 volt              

    D)                         260 volt

    Correct Answer: B

    Solution :

                    Induced e.m.f. \[{{E}_{S}}=E+iR\] \[=220+4\times \frac{P}{{{i}^{2}}}\] \[=200+4\times \frac{20}{16}=225volt\]


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