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
Power Amplifier
The power amplifier is an electronic amplifier designed to maximize the signal strength of a given input. The input signal strength is enhanced to a high enough level to drive output devices such as speakers, headphones, RF (Radio frequency) transmitters, etc. Unlike voltage / current amplifiers, the power amplifier is designed to drive core loads directly and is used as a storage block in the amplifier series.
Maximum Efficiency Criterion
In every field of engineering, there is a tremendous use of the machine and all those machines are equipped for their popular work efficiency so it very much important for operation engineers to monitor the efficiency of the machine, planning engineers to check out the efficiency of the machine before installing the machine and design engineers to design machine for higher efficiency than and then the utility will procure their products that will ultimately lead to profit and loss of the company. It indicates the importance of efficiency right from the initial stage as manufacturing units, intermediate stage as planning coordinators, and end-users stage as a utility.
![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](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1040dd79-e54e-4bb9-96f3-d3d337511acf%2Fe9f86223-1c3a-4831-af89-a0a382ee1b98%2Fonn2jt_processed.jpeg&w=3840&q=75)
![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
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with
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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
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