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A 1. Maximum power is delivered from a source of power to a load when the a. load current is equal to the power source current b. impedance of the load is equal to the output impedance of the powes source c. output impedance of the power source is high compared to the impedance of the load d. output impedance of the power source is low compared to the impedance of the load 2. The emitter follower is a (an). a. impedance matching device b. high gain voltage amplifier c. phase inverter d. combination power and voltage amplifier 3. The emitter follower uses a. no collector resistor. b. a forward bias collector-base junction c. negative feedback (degeneration) d. an NPN transistor only

A 1. Maximum power is delivered from a source of power to a load when the a. load current is equal to the power source current b. impedance of the load is equal to the output impedance of the powes source c. output impedance of the power source is high compared to the impedance of the load d. output impedance of the power source is low compared to the impedance of the load 2. The emitter follower is a (an). a. impedance matching device b. high gain voltage amplifier c. phase inverter d. combination power and voltage amplifier 3. The emitter follower uses a. no collector resistor. b. a forward bias collector-base junction c. negative feedback (degeneration) d. an NPN transistor only

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)
10th Edition
ISBN:9781337399128
Author:Russell E. Smith
Publisher:Russell E. Smith
Chapter17: Commercial And Industrial Air-conditioning Control Systems
Section: Chapter Questions
Problem 6RQ
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TEST Read the question carefully. Write the letter for each correct answer in the blank space provided. A 1. Maximum power is delivered from a source of power to a load when the a. load current is equal to the power source current b. impedance of the load is equal to the output impedance of the power source c. output impedance of the power source is high compared to the impedance of the load d. output impedance of the power source is low compared to the impedance of the load 2. The emitter follower is a (an) a. impedance matching device b. high gain voltage amplifier c. phase inverter d. combination power and voltage amplifier 3. The emitter follower uses a. no collector resistor b. a forward bias collector-base junction c. negative feedback (degeneration) d. an NPN transistor only 4. The emitter follower has output resistance. a. high, high b. low, low c. low, high d. high, low input resistance and 5. The current gain of an emitter follower is a. less than 1 b. equal to 1 c. greater than 1 d. less than a common amplifier
Transcribed Image Text:TEST Read the question carefully. Write the letter for each correct answer in the blank space provided. A 1. Maximum power is delivered from a source of power to a load when the a. load current is equal to the power source current b. impedance of the load is equal to the output impedance of the power source c. output impedance of the power source is high compared to the impedance of the load d. output impedance of the power source is low compared to the impedance of the load 2. The emitter follower is a (an) a. impedance matching device b. high gain voltage amplifier c. phase inverter d. combination power and voltage amplifier 3. The emitter follower uses a. no collector resistor b. a forward bias collector-base junction c. negative feedback (degeneration) d. an NPN transistor only 4. The emitter follower has output resistance. a. high, high b. low, low c. low, high d. high, low input resistance and 5. The current gain of an emitter follower is a. less than 1 b. equal to 1 c. greater than 1 d. less than a common amplifier
3-12 6. The output signal from the emitter follower. a. is obtained from the collector b. is obtained from the emitter c. has a greater amplitude than the input signal d. has a lower amplitude than the signal on the collector 7. In the emitter follower circuit shown in Figure 7. a. Q1 in an NPN transistor b. C2 blocks AC signals and passes DC signals c. the output signal is developed across R3 d. electron flow through Q1 is from the emitter to the collector O-9 Q www. 2 with 01 C2 HTO OUTPUT Figure 7. Emitter Follower Diagram 8. In the emitter follower shown in Figure 7, a. R3 has no effect on the base-emitter junction b. all base current flows through R2 c. all base current flows through the collector d. all collector current flows through R3 9. In Figure 7, a. C2 must have a high reactance at the frequency of the signal b. the value of R3 must be very low c. no AC signal appears on the collector d. the collector current is the sum of the base and emitter currents 10. In Figure 7, a. the emitter current is the sum of the base and collector current of Q1 b. the only current flowing through R1 is the base current c. the collector of Q1 is positive with respect to the emitter d. the bias voltage for Q1 is developed across R1 and R2 Copyright 2001 by Nida Corporati
Transcribed Image Text:3-12 6. The output signal from the emitter follower. a. is obtained from the collector b. is obtained from the emitter c. has a greater amplitude than the input signal d. has a lower amplitude than the signal on the collector 7. In the emitter follower circuit shown in Figure 7. a. Q1 in an NPN transistor b. C2 blocks AC signals and passes DC signals c. the output signal is developed across R3 d. electron flow through Q1 is from the emitter to the collector O-9 Q www. 2 with 01 C2 HTO OUTPUT Figure 7. Emitter Follower Diagram 8. In the emitter follower shown in Figure 7, a. R3 has no effect on the base-emitter junction b. all base current flows through R2 c. all base current flows through the collector d. all collector current flows through R3 9. In Figure 7, a. C2 must have a high reactance at the frequency of the signal b. the value of R3 must be very low c. no AC signal appears on the collector d. the collector current is the sum of the base and emitter currents 10. In Figure 7, a. the emitter current is the sum of the base and collector current of Q1 b. the only current flowing through R1 is the base current c. the collector of Q1 is positive with respect to the emitter d. the bias voltage for Q1 is developed across R1 and R2 Copyright 2001 by Nida Corporati
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