ETA 3 Exam Study Questions and
Answers.
If the gate voltage level that turns on an active SCR drops below the trigger point, while
anode and cathode voltage are maintained, what will occur? Answer - Stays On
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 amplifiers is ____ coupling. Answer -
Transformer
The drawing in the figure below is a _____ amplifier Answer - Negative Clamper
If a power supply produces 20 volts with no load and 15 volts under full load what is the
percent of regulation? Answer - 100 * (20-15)/15 = 33.33333
In the figure below which of the silicon diodes will conduct, given the voltages apllied?
Answer - .9 -> .2
The maximum reverse-bias voltage that may be applied to a diode without causing
junction 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
With the source input connected to the 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 Answer - Resistant component attached to the end of a
transmission line to absorb all incident energy.
Answers.
If the gate voltage level that turns on an active SCR drops below the trigger point, while
anode and cathode voltage are maintained, what will occur? Answer - Stays On
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 amplifiers is ____ coupling. Answer -
Transformer
The drawing in the figure below is a _____ amplifier Answer - Negative Clamper
If a power supply produces 20 volts with no load and 15 volts under full load what is the
percent of regulation? Answer - 100 * (20-15)/15 = 33.33333
In the figure below which of the silicon diodes will conduct, given the voltages apllied?
Answer - .9 -> .2
The maximum reverse-bias voltage that may be applied to a diode without causing
junction 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
With the source input connected to the 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 Answer - Resistant component attached to the end of a
transmission line to absorb all incident energy.
