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GATE EE 2025 Set 1 — Question 48

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MCQ+2 / -0.67MediumControlled Rectifiers (3φ)AC-DC ConvertersPower Electronics

Power Electronics → AC-DC Converters → Controlled Rectifiers (3φ)

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Question

In the following circuit, the average voltageVo=400(1+cos⁡α3) V,V_o = 400 \left(1 + \frac{\cos \alpha}{3}\right) \text{ V},where α\alpha is the firing angle. If the power dissipated in the resistor is 64 W, then the closest value of α\alpha in degrees is
A circuit diagram showing a three-phase AC source connected to a controlled rectifier block, feeding a load consisting of a 1 $\Omega$ resistor, a 100 mH inductor, and a 500 V DC source.
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