A step up transformer works on 220V and gives 2A to an external resistor. The turn ratio between the primary and secondary coils is 2 : 25. Assuming 100% efficiency, find the secondary voltage. Primary current and power delivererd.

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2750V, 25A, 5500W

5500V, 0.16A, 2750W

1600V, 1A, 5000W

4000V, 1A, 5500W

answer is A.

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Detailed Solution

IN a transformer εsεp=NsNp εs=220×252⇒2750VFor a 100% efficient transformer→ipεp=isεsip=2×2750220=25A→p=isεs⇒5500W

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