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एक ट्रांसफॉर्मर की प्राथामिक कुण्डली 100 फेरे है तथा 8 ऐम्पियर धारा प्रवाहित हो रही है । यदि एक किलोवाट शक्ति निविष्ट की जाये तो इसकी द्वितीयक कुण्डली में 500 वोल्ट उत्पन्न करने के लिए आवयश्क फेरो की संख्या होगी -
A. 100
B. 200
C. 400
D. 300

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`P_(s)=P_(p)impliesV_(s)xxI_(p)=V_(p)xxI_(p)=1000`
अब `V_(s)xxI_(s)=1000implies500xxI_(5)=1000`
`impliesI_(2)=2` ऐम्पियर
`:.(N_(s))/(N_(p))=(I_(p))/(I_(s))implies(N_(s))/(100)=(8)/(2)impliesN_(s)=400`.

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