Practice question

MCQ

Question

A transformer has \( N_p = 450 \), \( N_s = 900 \). If \( V_p = 120 \, \text{V} \) (rms), what is the
secondary voltage?

Options

Choose one · Correct answer highlighted

220 V 240 V Correct 260 V 280 V

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 has \( N_p = 450 \), \( N_s = 900 \). If \( V_p = 120 \, \text{V} \) (rms), what is the secondary voltage?