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

  • question_answer
     A transformer has turn ratio 100/1. If secondary coil has 4 amp current then current in primary coil is [RPET 2000]

    A)            4 A

    B)            0.04 A

    C)            0.4 A                                        

    D)            400 A

    Correct Answer: B

    Solution :

               \[\frac{{{i}_{p}}}{{{i}_{s}}}=\frac{{{N}_{s}}}{{{N}_{p}}}\Rightarrow \frac{{{i}_{p}}}{4}=\frac{1}{100}\Rightarrow {{i}_{p}}=0.04\ A\]


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