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RAJASTHAN PMT Rajasthan - PMT Solved Paper-1995

  • question_answer
    Dimension of a rectangular coil is\[20cm\times 10cm\]. Number of turns in coil is 60. It is rotating in an uniform magnetic field of \[0.5T,\]with a speed 1800 r.p.m. the maximum induced e.m.f. is:

    A)  \[98\,V\]            

    B)                         \[110\,V\]         

    C)         \[113\,V\]         

    D)                         \[118\,V\]

    Correct Answer: C

    Solution :

    Maximum induced e.m.f. \[E=N\,A\,B\,\omega \] \[=N\,A\,B\,.\,2\pi n\] \[=60\times 20\times 30\times {{10}^{-4}}\times 0.5\times 2\pi \times \frac{1800}{60}\] \[=113\,volt\]


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