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Railways RRB (Assistant Loco Pilot & Technician) Solved Paper-2 (2013)

  • question_answer
    In a transformer, 220 AC voltage is increased to 2200 V. If the number of turns in the secondary are 2000, then the number of turns in the primary will be

    A)  20      

    B)  100     

    C)  50      

    D)  200

    Correct Answer: D

    Solution :

    \[\frac{{{V}_{1}}}{{{V}_{2}}}=\frac{{{N}_{1}}}{{{N}_{2}}}\,\,{{N}_{1}}=\frac{{{V}_{1}}}{{{V}_{2}}}{{N}_{2}}=\left( \frac{220}{2200} \right)2000=200\]


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