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MGIMS WARDHA MGIMS WARDHA Solved Paper-2013

  • question_answer
    A step-up transformer has transformation ratio\[3:2\]. The voltage in the secondary coil, if the voltage in the primary is 30 V will be

    A) 300V                     

    B) 90V   

    C) 45V                       

    D)  23V

    Correct Answer: C

    Solution :

    Transformation ratio \[{{N}_{s}}:{{N}_{p}}=3:2\] Potential in primary \[{{E}_{p}}=30V\] From the relation, we have \[\frac{{{E}_{s}}}{{{E}_{p}}}=\frac{{{N}_{s}}}{{{N}_{p}}}\] \[{{E}_{s}}={{E}_{p}}\frac{{{N}_{s}}}{{{N}_{p}}}\] \[=30\times \frac{3}{2}=45\,V\]


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