19 Figure 3A.Complete full-wave rectifier. IN ANSWERING QUESTIONS 3-19 AND 3-20, REFER TO FIGURE 3A. ASSUME THAT THE VOLTAGE ACROSS THE TRANSFORMER SECONDARY HAS AN RMS VALUE OF 240 VOLTS AC. 3-19. What is the peak value of the voltage pulses across the load? 1. 339.4 volts 2. 239.8 volts 3. 169.7 volts 4. 76.3 volts 3-20. What is the average output voltage? 1. 237.5 volts 2. 169.7 volts 3. 152.3 volts 4. 108.1 volts THIS SPACE LEFT BLANK INTENTIONALLY.Figure 3B.Bridge rectifier. IN ANSWERING QUESTIONS 3-21 AND 3-22, REFER TO FIGURE 3B. 3-21. When the voltage across the secondary of the transformer has the polarity shown, which of the diodes will conduct? 1. V1 and V3 2. V2 and V4 3. V1 and V2 4. V3 and V4 3-22. When the polarity reverses, which of the diodes will conduct? 1. V3 and V1 2. V4 and V2 3. V2 and V1 4. V4 and V3 3-23. In filter circuits, inductors are used as what kind of impedances? 1. Shunt impedances to oppose changes in current 2. Shunt impedances to oppose changes in voltage 3. Series impedances to oppose changes in current 4. Series impedances to oppose changes in voltage
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