A single phase half wave rectifier is feeding a resistive load. When a = 0, dc output voltage is 127 V. When a = 30°, the dc output voltage will be about

• 127 V
• 120 V
• 110 V
• 100 V

Correct Answer: 120 V

Explanation:

Using Eq

= 0.933.

Hence V_dc for 30° firing angle = 0.933 x 127 = ≈ 120 V.