Electronic Devices And Circuits Set 2
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This set of Electronic Devices and Circuits Multiple Choice Questions & Answers (MCQs) focuses on Electronic Devices And Circuits Set 2
Q1 | For normal operation of a pnp BJT, the base must be with respect to the emitter and with respect to the collector.
- positive, negative
- positive, positive
- negative, positive
- negative, negative
Q2 | A transistor amplifier has a voltage gain of 100. If the input voltage is 75 mV, the output voltage is:
- 1.33 v
- 7.5 v
- 13.3 v
- 15 v
Q3 | A 35 mV signal is applied to the base of a properly biased transistor with an r'e = 8 Ω and RC = 1 kΩ. The output signal voltage at the collector is:
- 3.5 v
- 28.57 v
- 4.375 v
- 4.375 mv
Q4 | What is the order of doping, from heavily to lightly doped, for each region?
- base, collector, emitter
- emitter, collector, base
- emitter, base, collector
- collector, emitter, base
Q5 | Which of the following is true for an npn or pnp transistor?
- ie = ib + ic
- ib = ic+ ie
- ic = ib + ie
- none of the above
Q6 | In what range of voltages is the transistor in the linear region of its operation?
- 0 < vce
- 0.7 < vce < vce(max)
- vce(max) > vce
- none of the above
Q7 | What does DC vary with?
- ic
- ºc
- both ic and ºc
- ic’, but not ºc
Q8 | What is (are) common fault(s) in a BJT-based circuit?
- pens or shorts internal to the transistor
- open bias resistor(s)
- external opens and shorts on the circuit board
- all of the above
Q9 | What is (are) general-purpose/small-signal transistors case type(s)?
- to-18
- to-92
- to-39
- all of the above
Q10 | The magnitude of dark current in a phototransistor usually falls in what range?
- ma
- μa
- na
- pa
Q11 | Which of the following devices has the highest input resistance?
- diode
- jfet
- mosfet
- bipolar junction transistor
Q12 | A self-biased n-channel JFET has a VD = 6 V. VGS = –3 V. Find the value of VDS.
- –3 v
- –6 v
- 3 v
- 6 v
Q13 | A JFET data sheet specifies VGS(off) = –6 V and IDSS = 8 mA. Find the value of ID when VGS = –3 V.
- 2 ma
- 4 ma
- 8 ma
- none of the above
Q14 | A JFET data sheet specifies VGS(off) = –10 V and IDSS = 8 mA. Find the value of ID when VGS = –3 V.
- 2 ma
- 1.4 ma
- 4.8 ma
- 3.92 ma
Q15 | The JFET is always operated with the gate-source pn junction -biased.
- forward
- reverse
- all of the above
- none of the above
Q16 | What type(s) of gate-to-source voltage(s) can a depletion MOSFET (D-MOSFET) operate with?
- zero
- positive
- negative
- any of the above
Q17 | The has a physical channel between the drain and source.
- d-mosfet
- e-mosfet
- v-mosfet
- none of the above
Q18 | All MOSFETs are subject to damage from electrostatic discharge (ESD).
- true
- false
Q19 | Midpoint bias for a D-MOSFET is ID = , obtained by setting VGS = 0.
- idss / 2
- idss / 3.4
- idss
Q20 | If VD is less than expected (normal) for a self-biased JFET circuit, then it could be caused by a(n)
- open rg.
- open gate lead.
- fet internally open at gate.
- all of the above
Q21 | A coupling capacitor is
- a dc short
- an ac open
- a dc open and an ac short
- a dc short and an ac open
Q22 | In a bypass circuit, the top of a capacitor is
- an open
- a short
- an ac ground
- a mechanical ground
Q23 | The capacitor that produces an ac ground is called a
- bypass capacitor
- coupling capacitor
- dc open
- ac open
Q24 | The output voltage of a CE amplifier is
- amplified
- inverted
- 180° out of phase with the input
- all of the above
Q25 | A common-gate amplifier is similar in configuration to which BJT amplifier?
- common-emitter
- common- collector
- common-base
- emitter- follower