2. Solved Papers
  3. Railways

Railways RRB (Assistant Loco Pilot & Technician) Solved Paper-2 (2014)

  • question_answer
    An ideal transformer has 100 turns in the primary and 250 turns in the secondary. The peack value of the AC is 28 V. The rms secondary voltage is nearest to

    A)  40 V                           

    B)  100 V   

    C)  70 V                           

    D)  50 V

    Correct Answer: D

    Solution :

    \[\frac{{{V}_{2}}}{\frac{28}{\sqrt{2}}}=\frac{250}{100}\Rightarrow {{V}_{2}}=\frac{28\times 250}{\sqrt{2}\times 100}=\frac{14\times 5}{\sqrt{2}}=\frac{70}{1.41}\approx 50\,V\]


You need to login to perform this action.
You will be redirected in 3 sec spinner