EMA Test
If the gate voltage level that turns on an active SCR 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 a 5mV sine wave (centered about +1.5 V). What will the
output be? - Answer-A 10 mV sine wave centered about +1.5V
or
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 hte following formulas should be used? - Answer-dB =
20log(V2/V1)
The most common method of coupling RF amplifiers is _____ coupling - Answer-RC
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-{(20-15)/15 = 0.333333333... = 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
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 (has XTAL)
With the souce 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 signed 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
If the gate voltage level that turns on an active SCR 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 a 5mV sine wave (centered about +1.5 V). What will the
output be? - Answer-A 10 mV sine wave centered about +1.5V
or
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 hte following formulas should be used? - Answer-dB =
20log(V2/V1)
The most common method of coupling RF amplifiers is _____ coupling - Answer-RC
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-{(20-15)/15 = 0.333333333... = 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
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 (has XTAL)
With the souce 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 signed 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
