A step down transformer has turns ratio 20: 1. If 8 V is applied across 0.4 ohm secondary then the primary current will be (a) 2 A (b) 1 A (c) 0.5 A (d) 4 A

Answer: (b). Secondary current: Is = Vs/R = 8/0.4 = 20 A (Ip)/(Is) = (Ns)/(Np) = 1/20 Ip = 20/20 = 1 A So the answer is (b) 1 A.

A step down transformer has turns ratio 20: 1. If 8 V is applied… | MHT CET 2021 (22 Sep, Shift 2)

Q38MHT CET 2021 · 22 SEP · SHIFT 2Easy

AC Generator & Transformer

A step down transformer has turns ratio $20 : 1$ . If $8\text{ V}$ is applied across $0.4\text{ ohm}$ secondary then the primary current will be

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Answer: (b)

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