Thyristors and Transducers Questions and Answers

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Showing 10 of 35 questions
Q11
Once a DIAC is conducting, the only way to turn it off is with:
  • A a positive gate voltage
  • B a negative gate voltage
  • C low-current dropout
  • D breakover
Answer: Option C
Q12
 The DIAC is a:
  • A transistor
  • B unidirectional device
  • C three-layer device
  • D bidirectional device
Answer: Option D
Q13
What type of application would use an injection laser diode?
  • A a 10BASE-T Ethernet
  • B a liquid crystal display
  • C a fiber optic transmission line
  • D a good flashlight
Answer: Option C
Q14
The PUT (programmable unijunction transistor) is actually a type of:
  • A UJT thyristor
  • B FET device
  • C TRIAC
  • D SCR
Answer: Option A
Q15
A transducer's function is to:
  • A transmit electrical energy
  • B convert energy
  • C produce mechanical energy
  • D prevent current flow
Answer: Option B
Q16
The primary function of the bias circuit is to
  • A hold the circuit stable at VCC
  • B hold the circuit stable at vin
  • C ensure proper gain is achieved
  • D hold the circuit stable at the designed Q-point
Answer: Option D
Q17
A JFET
  • A is a current-controlled device
  • B has a low input resistance
  • C is a voltage-controlled device
  • D is always forward-biased
Answer: Option C
Q18
The capacitor that produces an ac ground is called a(n)
  • A coupling capacitor
  • B dc open
  • C bypass capacitor
  • D ac open
Answer: Option C
Q19
In a class B push-pull amplifier, the transistors are biased slightly above cutoff to avoid
  • A crossover distortion
  • B unusually high efficiency
  • C negative feedback
  • D a low input impedance
Answer: Option A
Q20
The depletion-mode MOSFET
  • A can operate with only positive gate voltages
  • B can operate with only negative gate voltages
  • C cannot operate in the ohmic region
  • D can operate with positive as well as negative gate voltages
Answer: Option D

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