MHT CET · Physics · Alternating Current
A step-up transformer operates on \(220 \mathrm{~V}\) and supplies current of \(2 \mathrm{~A}\). The ratio of primary and secondary windings is \(1: 20\). The current in the primary is
- A \(5 A\)
- B \(2 A\)
- C \(40 A\)
- D \(20 A\)
Answer & Solution
Correct Answer
(C) \(40 A\)
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \frac{N_{\mathrm{s}}}{N_p}=20=\frac{I_p}{I_s} \\ & \therefore I_p=20 I_S \\ & =20 \times 2=40 \mathrm{~A}\end{aligned}\)
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