ELECTRONICS FINAL EXAM
QUESTIONS & ANSWERS RATED
100% CORRECT
IGBT - Correct Answer ✔✔ What transistor type requires a grounded wrist strap
Decrease - Correct Answer ✔✔ Increasing the base current of a BJT will cause its
impedance to
Positive, source - Correct Answer ✔✔ To shut off a p channel JFET the gate terminal
must be made more ________ than the ________
Optoisolation - Correct Answer ✔✔ When a triac is used in a solid state relay, what is
used to isolate the '' coil'' circuit from the grid
17.98 ( 24v x 0.72% + 0.70v ) - Correct Answer ✔✔ A UJT with an intrinsic standoff
ratio of 72% is connected to a 24V circuit, what is the turn on voltage for the UJT
Collector - Correct Answer ✔✔ What is the most negative terminal of a properly biased
PNP bipolar transistor
Decrease - Correct Answer ✔✔ Decreasing the base current of a BJT will cause its
collector current to Decrease
4 - Correct Answer ✔✔ How many semiconductor layers are used in the construction of
a thyristor
Reducing emitter current below the valley current - Correct Answer ✔✔ Once a UJT is
switched on, how is the device switched off?
Oscillators - Correct Answer ✔✔ Unijunction transistors are primarily used to construct
Cutoff - Correct Answer ✔✔ When the impedance of a transistor is very high, it is in the
_____ mode of operation
Reduced DC output voltage - Correct Answer ✔✔ Delaying the turn on of the SCR in a
converter circuit will cause its collector
Ac rated voltage activated switch - Correct Answer ✔✔ A diac is best described as a
O/L with the black lead on the anode and red lead on the cathode 0.7 with the leads
reversed - Correct Answer ✔✔ When testing a good SCR with a diode tester connected
QUESTIONS & ANSWERS RATED
100% CORRECT
IGBT - Correct Answer ✔✔ What transistor type requires a grounded wrist strap
Decrease - Correct Answer ✔✔ Increasing the base current of a BJT will cause its
impedance to
Positive, source - Correct Answer ✔✔ To shut off a p channel JFET the gate terminal
must be made more ________ than the ________
Optoisolation - Correct Answer ✔✔ When a triac is used in a solid state relay, what is
used to isolate the '' coil'' circuit from the grid
17.98 ( 24v x 0.72% + 0.70v ) - Correct Answer ✔✔ A UJT with an intrinsic standoff
ratio of 72% is connected to a 24V circuit, what is the turn on voltage for the UJT
Collector - Correct Answer ✔✔ What is the most negative terminal of a properly biased
PNP bipolar transistor
Decrease - Correct Answer ✔✔ Decreasing the base current of a BJT will cause its
collector current to Decrease
4 - Correct Answer ✔✔ How many semiconductor layers are used in the construction of
a thyristor
Reducing emitter current below the valley current - Correct Answer ✔✔ Once a UJT is
switched on, how is the device switched off?
Oscillators - Correct Answer ✔✔ Unijunction transistors are primarily used to construct
Cutoff - Correct Answer ✔✔ When the impedance of a transistor is very high, it is in the
_____ mode of operation
Reduced DC output voltage - Correct Answer ✔✔ Delaying the turn on of the SCR in a
converter circuit will cause its collector
Ac rated voltage activated switch - Correct Answer ✔✔ A diac is best described as a
O/L with the black lead on the anode and red lead on the cathode 0.7 with the leads
reversed - Correct Answer ✔✔ When testing a good SCR with a diode tester connected
