IGNOU BPHET 143 2026 - The turns ratio of a transformer used in half wave rectifier is 30:1.

Question

The turns ratio of a transformer used in half wave rectifier is 30:1. The primary is connected to the power mains: $220 \text{ V}, 50 \text{ Hz}$ . If the diode resistance in forward bias is $10\text{ }\Omega$ and the load resistance, R_L is $1 \text{ k}\Omega$ , determine
i) the peak value, the dc value and the rms value of current;
ii) the ripple factor

19 Jan 2026

Answer :

Word Count : 199

In a half-wave rectifier, the transformer steps down the AC voltage according to its turns ratio. Given a transformer with a turns ratio of (N_1:N_2 = 30:1), if the primary voltage is (V_p), the secondary voltage (V_s) is calculated using the turns ratio equation: [ V_s = \frac{N_2}{N_1} V_p = \frac{1}{30} V_p ] Assuming the diode

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