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Manipal Medical Manipal Medical Solved Paper-2000

  • question_answer
    A stepup transformer has transformation ratio\[3:2\]. The voltage in the secondary coil, if the voltage m the primary is 30 volt, will be:

    A)  300 V            

    B)  90 V

    C)  45 V             

    D)  23 V

    Correct Answer: C

    Solution :

     Here: Transformation ratio \[{{N}_{s}}:{{N}_{p}}=3:2\] Potential in primary \[{{E}_{p}}=30\,V\] From the relation, we have \[\frac{{{E}_{s}}}{{{E}_{p}}}=\frac{{{N}_{s}}}{{{N}_{p}}}\] Or \[{{E}_{s}}={{E}_{p}}=\frac{{{N}_{s}}}{{{N}_{p}}}\] \[=30\times \frac{3}{2}=45\,V\] (where\[{{E}_{s}}\]is the voltage in secondary)


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