A) 11 kW
B) 12 kW
C) 14 kW
D) 15 kW
Correct Answer: D
Solution :
(d) 15 kW Here, \[{{V}_{P}}=11000\,\,V,\,\,{{V}_{S}}=220\,\,V\] \[{{N}_{P}}=6000,\,\eta =60%:\,{{P}_{0}}=9\,kW=9\times {{10}^{3}}W\] Efficiency, \[\eta =\frac{Output\,power}{Input\,\,power}=\frac{{{P}_{0}}}{{{P}_{i}}}\] \[\therefore {{P}_{i}}=\frac{{{P}_{0}}}{\eta }=\frac{9\times {{10}^{3}}}{60/100}=1.5\times {{10}^{4}}=15\,kW\]You need to login to perform this action.
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