Practice question

MCQ

Question

A transformer steps up \( 220 \, \text{V} \) to \( 440 \, \text{V} \). If the primary current is \( 10
\, \text{A} \), what is the secondary current?

Options

Choose one · Correct answer highlighted

4 A 5 A Correct 6 A 7 A

Explanation

**Transformer** works on mutual induction, V_s/V_p = N_s/N_p, I_s/I_p = N_p/N_s for ideal (power conserved V_p I_p = V_s I_s), step-up N_s>N_p V_s>V_p I_s

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A transformer steps up \( 220 \, \text{V} \) to \( 440 \, \text{V} \). If the primary current is \( 10 \, \text{A} \), what is the secondary current?