JEE Main & Advanced Physics Electro Magnetic Induction Question Bank Application of EMI (Motor, Dynamo, Transformer)

  • question_answer
    What is increased in step-down transformer  [MP PMT/PET 1998; CPMT 1999]

    A)            Voltage                                  

    B)             Current

    C)            Power                                     

    D)             Current density

    Correct Answer: B

    Solution :

                       We know that for step down transformer                    \[{{V}_{p}}>{{V}_{s}}\] but \[\frac{{{V}_{p}}}{{{V}_{s}}}=\frac{{{i}_{s}}}{{{i}_{p}}};\ \ \therefore {{i}_{s}}>{{i}_{p}}\]            Current in the secondary coil is greater than the primary.


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