JEE Main & Advanced Sample Paper JEE Main Sample Paper-43

  • question_answer
    A transformer is used to step-up an transformation \[emf\] of 220 V to 4.4 kV in order to transmit 6.6 kV of power. If the primary coil has 100 turns, what is the number of turns in the secondary?

    A)  20                              

    B)  200             

    C)  2000                          

    D)  20000

    Correct Answer: C

    Solution :

     We have, \[{{N}_{S}}=\left( \frac{{{\rho }_{S}}}{{{\rho }_{P}}} \right)\times {{N}_{P}}\] \[x\] Here, \[\therefore \] and \[f(x)\] are see secondary and primary voltages of the transformer.

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