1. Circuits which are designed to maintain a constant voltage or current are called a. regulators b. multipliers c. doub

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: 1 Circuits Which Are Designed To Maintain A Constant Voltage Or Current Are Called A Regulators B Multipliers C Doub 1 (40.66 KiB) Viewed 63 times

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1. Circuits which are designed to maintain a constant voltage or current are called a. regulators b. multipliers c. doubles d. controllers 2. If the load current decreases, the reason for this decreased load current is a/an a. increased input voltage b. decreased Rv c. increased RL d. decreased Ri NOTE Refer to Figure 2 of the lesson when answering questions 3 and 4. 3. If the load current decreases, the value of the emitter voltage before regulation will increase a. b. decrease C. remain the same d. none of the above If the input voltage increases, the a. voltage across CR1 will decrease b. impedance of Q1 increases C. output impedance of RL will increase d. voltage across the base-collector junction decreases NOTE Refer to Figure 3 of the lesson when answering questions 5 and 6. 5. The purpose of the zener diode CRI is to maintain a constant a. collector-base voltage. b. regulated output voltage emitter base voltage C. d. voltage across R1 4.

6. If the current flowing through RL increases because RL decreases, a. the voltage across Rs will decrease the transistor current will decrease b. c. the base-emitter voltage will increase the voltage across CR1 will decrease d. 7. The electronic circuit which makes better voltage regulation possible is called a . a. series regulator b. voltage doubler c. voltage comparator d. shunt regulator NOTR Refer to Figure 6 of the lesson when answering questions 9 and 10. 8. A differential amplifier produces signals that are in amplitude and with each other. 9. If the reference diode D1 shorts a. the regulated output voltage will be low. b. C. the regulated output voltage will be high. there will be no regulated output voltage transistor Q2 will burn out. d. 10. If the resistance of Q2 decreases the output voltage will not change b. the output voltage will be low. c. there will be no output voltage d. the voltage drop across R1 will be increased

Unregulated DC Voltage Input = 15 V Figure 2. R1 Q1 9.4 V Regulated Eout CR1 10 V Series Type Voltage Regulator

Unregulated DC Voltage Input 15 V CR1 9.3 V 10 V Regulated E out Rs www Shunt Type Voltage Regulator PR1 Figure 3.

Q1 2N3055 R1 2 ko SRG $100 a R7 SRB $100 a $200 a kn DI * IN750A | KQ Figure 6. PC130-26 Variable Output Voltage Regulator, Schematic Diagram - 02 2N3567 ka