ETA EM3 101101 Latest Exam with
Complete Solutions.
What's the effect of a crystal? - Answer piezoelectric
if the gate voltage level, that turns an active SCR on, drops below the trigger point, while anode
and cathode voltages are maintained, what will occur? - Answer stays on
The input of the op-amp in the figure below is 5mv sine wave (center about +1.5v). What will
the out put be - Answer A 10 mv sine wave centered about +3V
Historically, the first number in a semiconductor identification code such as 1N345A indicates
the - Answer Number of junctions
When calculating voltage ratios which of the following formulas should be used? - Answer -
dB=20log(v2/v1)
The most common method of coupling RF amplifier what type of coupling - Answer
transformer
the drawing in the figure below is a what type of amplifier - Answer negative clamper
If a power supply produces 20 V with no load and 15 V under full load, what is the percent of
regulation? - Answer {(20-15)/15= 0.333...=33.3%}
In the figure below which of the silicon diodes will conduct, given the voltages applied? -
Answer 0.9 > 0.2
The maximum reverse-bias voltage that may be applied to a diode without causing suction
breakdown is the ______. - Answer Peak reversed voltage
Tunnel diodes can be used as - Answer Oscillators
The basic components of a series voltage regulator are: - Answer zener diode, transistor, and
resistor
The amplifier shown in the figure below is a/an ________ oscillator. - Answer Pierce (has
XTAL)
, With the source input connected to channel one of an oscilloscope, you should use the input
coupling switch in the AC position when _________. - Answer the AC component of a signal
needs to be seen
A "dummy load" is a/an: - Answer Resistive component that is attached to the end of
transmission line to absorb all incident energy
Pierce oscillators use quartz crystals, these crystals will exhibit the ______ effect. - Answer
Piezoelectric
A differentiator circuit consists of resistors and capacitors assigned to change an AC input to a
DC output. - Answer False
What are the two main factors that affect the frequency response of an amplifier's circuit? -
Answer Capacitance and Inductance
Which of the following is the proper equation to calculate the alpha gain of a transistor? -
Answer A=B/(B+1)
What is the effect on a varactor diode (varicap) when the reverse bias voltage is increased? -
Answer Capacitance decreases
The most common method of coupling between two stages of an analog circuit is ______
coupling. - Answer Direct
The ideal frequency response of an audio amplifier is equal gain from _________. - Answer
15Hz to 20KHz
Which of the following are the three most commonly used bipolar junction transistor amplifier
configurations? - Answer Common emitter, common collector and common base
What are the four basic sections that make up a power supply? - Answer Transformer,
rectifier, filter and regulator
When calculating decibels and power, a 3dB gain indicates a __________. - Answer Doubling
of power
Complete Solutions.
What's the effect of a crystal? - Answer piezoelectric
if the gate voltage level, that turns an active SCR on, drops below the trigger point, while anode
and cathode voltages are maintained, what will occur? - Answer stays on
The input of the op-amp in the figure below is 5mv sine wave (center about +1.5v). What will
the out put be - Answer A 10 mv sine wave centered about +3V
Historically, the first number in a semiconductor identification code such as 1N345A indicates
the - Answer Number of junctions
When calculating voltage ratios which of the following formulas should be used? - Answer -
dB=20log(v2/v1)
The most common method of coupling RF amplifier what type of coupling - Answer
transformer
the drawing in the figure below is a what type of amplifier - Answer negative clamper
If a power supply produces 20 V with no load and 15 V under full load, what is the percent of
regulation? - Answer {(20-15)/15= 0.333...=33.3%}
In the figure below which of the silicon diodes will conduct, given the voltages applied? -
Answer 0.9 > 0.2
The maximum reverse-bias voltage that may be applied to a diode without causing suction
breakdown is the ______. - Answer Peak reversed voltage
Tunnel diodes can be used as - Answer Oscillators
The basic components of a series voltage regulator are: - Answer zener diode, transistor, and
resistor
The amplifier shown in the figure below is a/an ________ oscillator. - Answer Pierce (has
XTAL)
, With the source input connected to channel one of an oscilloscope, you should use the input
coupling switch in the AC position when _________. - Answer the AC component of a signal
needs to be seen
A "dummy load" is a/an: - Answer Resistive component that is attached to the end of
transmission line to absorb all incident energy
Pierce oscillators use quartz crystals, these crystals will exhibit the ______ effect. - Answer
Piezoelectric
A differentiator circuit consists of resistors and capacitors assigned to change an AC input to a
DC output. - Answer False
What are the two main factors that affect the frequency response of an amplifier's circuit? -
Answer Capacitance and Inductance
Which of the following is the proper equation to calculate the alpha gain of a transistor? -
Answer A=B/(B+1)
What is the effect on a varactor diode (varicap) when the reverse bias voltage is increased? -
Answer Capacitance decreases
The most common method of coupling between two stages of an analog circuit is ______
coupling. - Answer Direct
The ideal frequency response of an audio amplifier is equal gain from _________. - Answer
15Hz to 20KHz
Which of the following are the three most commonly used bipolar junction transistor amplifier
configurations? - Answer Common emitter, common collector and common base
What are the four basic sections that make up a power supply? - Answer Transformer,
rectifier, filter and regulator
When calculating decibels and power, a 3dB gain indicates a __________. - Answer Doubling
of power
