1475 + Mcqs in Electronic Devices McqOptions

1.	In a comparator, the level of the reference voltage must be ________.
A.	negative
B.	positive
C.	zero
D.	All of the above
Answer» E.

Discussion

2.	The response time for cadmium selenide (CdSe) is ________.
A.	100 ms
B.	50 ms
C.	25 ms
D.	10 ms
Answer» E.

Discussion

3.	Schottky diodes have ________.
A.	quick response time
B.	a lower noise figure
C.	both quick response time and a lower noise figure
D.	None of the above
Answer» D. None of the above

Discussion

4.	The JFET operates with a reverse-biased pn junction (gate-to source).
A.	True
B.	False
Answer» B. False

Discussion

5.	The three FET terminals are called source, base, and drain.
A.	True
B.	False
Answer» C.

Discussion

6.	In a millivoltmeter, the diodes and the capacitor are used in ________ parts of the circuit.
A.	the dc
B.	the ac
C.	both the dc and ac
D.	neither the dc nor ac
Answer» C. both the dc and ac

Discussion

7.	________ can be used as a voltage-controlled voltage source.
A.	Only an inverting op-amp circuit
B.	Only a noninverting op-amp circuit
C.	Neither inverting nor noninverting op-amp circuits
D.	Both inverting and noninverting op-amp circuits
Answer» E.

Discussion

8.	In photodiodes, an increase in light intensity ________ the reverse current.
A.	increases
B.	decreases
C.	maintains
D.	None of the above
Answer» B. decreases

Discussion

9.	The p-n junction of a tunnel diode is doped at a level from ________ to ________ times that of a typical semiconductor diode.
A.	one, several
B.	several, ten
C.	more than ten, several hundred
D.	one hundred, several thousand
Answer» E.

Discussion

10.	In general, silicon ________.
A.	has a higher conversion efficiency
B.	has greater stability
C.	is less subject to fatigue
D.	All of the above
Answer» E.

Discussion

11.	The E-MOSFET has no physical channel.
A.	True
B.	False
Answer» B. False

Discussion

12.	One advantage of a JFET over the BJT is its high input resistance.
A.	True
B.	False
Answer» B. False

Discussion

13.	The MOSFET has no pn junction.
A.	True
B.	False
Answer» B. False

Discussion

14.	An OL indication on an advanced digital meter indicates ________ while checking a transistor.
A.	forward bias
B.	reverse bias
C.	definitely a defective transistor
D.	None of the above
Answer» C. definitely a defective transistor

Discussion

15.	The common-collector configuration has a ________ input impedance and a ________ output impedance.
A.	low, high
B.	high, low
C.	high, high
D.	low, low
Answer» C. high, high

Discussion

16.	The leads of a transistor are typically made of ________.
A.	gold
B.	aluminum
C.	nickel
D.	All of the above
Answer» C. nickel

Discussion

17.	If the positive lead of an ohmmeter is connected to the base and the negative lead to the emitter, a low resistance reading would indicate a ________ transistor and a high resistance reading would indicate a ________ transistor.
A.	<i>npn, pnp</i>
B.	<i>pnp, npn</i>
C.	<i>npn, npn</i>
D.	<i>pnp, pnp</i>
Answer» B. <i>pnp, npn</i>

Discussion

18.	Typical values of voltage amplification for the common-base configurations vary from ________ and the current gain is always ________ .
A.	less than 1, 50 to 300
B.	50 to 300, larger than 1
C.	50 to 300, less than 1
D.	larger than 1, 50 to 300
Answer» D. larger than 1, 50 to 300

Discussion

19.	If a value of is specified for a particular transistor configuration it will normally be used for ________ calculations.
A.	ac
B.	dc
C.	ac and dc
D.	None of the above
Answer» D. None of the above

Discussion

20.	The doping of the sandwiched layer is ________ that of the outer layers.
A.	considerably less than
B.	the same as
C.	considerably more than
D.	None of the above
Answer» B. the same as

Discussion

21.	The frequency of the 566 VCO is set by ________.
A.	an external resistor
B.	an external capacitor
C.	both an external resistor and an external capacitor
D.	None of the above
Answer» D. None of the above

Discussion

22.	The 311 voltage comparator can operate from ________.
A.	dual power supplies of 15 V
B.	a single +5 V supply
C.	either a dual power supply of 15 V or a single +5 V supply
D.	None of the above
Answer» D. None of the above

Discussion

23.	In interfacing circuitry, a receiver provides ________ input impedance to minimize loading of the input signal.
A.	high
B.	medium
C.	low
D.	zero
Answer» B. medium

Discussion

24.	In an emitter-follower, the voltage gain is ________.
A.	slightly less than 1
B.	slightly more than 1
C.	a very large value
D.	None of the above
Answer» B. slightly more than 1

Discussion

25.	In ________ configuration(s) a depletion-type MOSFET can operate in enhancement mode.
A.	self-bias
B.	fixed-bias with no V
C.	<sub>GG</sub>
D.	voltage-divider
E.	None of the above
Answer» D. voltage-divider

Discussion

26.	A class C amplifier is a linear amplifier.
A.	True
B.	False
Answer» C.

Discussion

27.	Class AB operation always requires a dual (+/ ) supply.
A.	True
B.	False
Answer» C.

Discussion

28.	In ________ power amplifiers, the output signal varies for a full 360 of the cycle.
A.	class A
B.	class B or AB
C.	class C
D.	class D
Answer» B. class B or AB

Discussion

29.	The arrow on the schematic symbol for a MOSFET indicates the channel material type.
A.	True
B.	False
Answer» C.

Discussion

30.	A VMOS device can handle higher power and voltage than a conventional MOSFET.
A.	True
B.	False
Answer» B. False

Discussion

31.	It is not necessary to exercise any particular care in handling a MOSFET.
A.	True
B.	False
Answer» C.

Discussion

32.	The Q-point in a JFET with voltage-divider bias is more stable than in a self-biased JFET.
A.	True
B.	False
Answer» B. False

Discussion

33.	In the saturation region the collector-base junction is ________-biased and the base-emitter junction is ________-biased for a transistor.
A.	reverse, forward
B.	forward, reverse
C.	reverse, reverse
D.	forward, forward
Answer» E.

Discussion

34.	The base current is the ________ of the emitter and collector currents.
A.	sum
B.	difference
C.	product
D.	None of the above
Answer» C. product

Discussion

35.	The outer layers of a transistor are ________ the sandwiched layer.
A.	much smaller than
B.	the same as
C.	much larger than
D.	None of the above
Answer» D. None of the above

Discussion

36.	________is the least stabilized circuit.
A.	Fixed bias
B.	Emitter-stabilized bias
C.	Voltage divider
D.	Voltage feedback
Answer» B. Emitter-stabilized bias

Discussion

37.	One of the most important characteristics of the FET is its ________ impedance.
A.	low input
B.	medium input
C.	high input
D.	None of the above
Answer» D. None of the above

Discussion

38.	The pinch-off voltage continues to drop in a ________ manner as VGS becomes more and more negative.
A.	linear
B.	parabolic
C.	cubic
D.	None of the above
Answer» C. cubic

Discussion

39.	In a curve tracer, the ________ reveals the distance between the VGS curves for the n-channel device.
A.	vertical sens.
B.	horizontal sens.
C.	Per step
D.	g
E.	<sub>m</sub>
Answer» D. g

Discussion

40.	Voltage multipliers take a dc input voltage, and provide a dc output voltage at a multiple of the input.
A.	True
B.	False
Answer» C.

Discussion

41.	The load line is defined by the ________ and a characteristic curve is defined by the ________.
A.	quiescent point, device
B.	device, network
C.	network, device
D.	None of the above
Answer» D. None of the above

Discussion

42.	The slope of the load line depends on the ________.
A.	type of the diode used
B.	characteristic curve
C.	load resistor
D.	source voltage
Answer» D. source voltage

Discussion

43.	Calculate the output voltage if V1 = V2 = 700 mV.
A.	0 V
B.	12 V
C.	12 V
D.	8 V
Answer» B. 12 V

Discussion

44.	The input impedance of a voltage buffer is ________.
A.	very low
B.	low
C.	high
D.	very high
Answer» E.

Discussion

45.	What is the function of a ladder network?
A.	Changing an analog signal to a digital signal
B.	Changing a linear signal to a digital signal
C.	Changing a digital signal to an analog signal
D.	None of the above
Answer» D. None of the above

Discussion

46.	The feedback signal in a(n) ________ oscillator is derived from a capacitive voltage divider in the LC circuit.
A.	Hartley
B.	Armstrong
C.	Colpitts
Answer» D.

Discussion

47.	For frequencies up to 1 MHz, the ________ is the most widely used type of sinusoidal RC oscillator.
A.	Wien-bridge
B.	phase-shift
C.	twin-T
Answer» B. phase-shift

Discussion

48.	In a full-wave rectifier, the dc voltage level is ________ the ripple voltage level.
A.	smaller than
B.	the same as
C.	larger than
D.	None of the above
Answer» D. None of the above

Discussion

49.	Which of the following semiconductor materials is (are) used for manufacturing solar cells?
A.	Gallium arsenide
B.	Indium arsenide
C.	Cadmium sulfide
D.	All of the above
Answer» E.

Discussion

50.	A Schottky diode has ________ level of current at the same applied bias compared to that of the p-n junction at both the forward- and reverse-bias regions.
A.	a lower
B.	a higher
C.	the same
D.	None of the above
Answer» C. the same

Discussion

Explore topic-wise MCQs in Testing Subject.

In a comparator, the level of the reference voltage must be ________.

The response time for cadmium selenide (CdSe) is ________.

Schottky diodes have ________.

The JFET operates with a reverse-biased pn junction (gate-to source).

The three FET terminals are called source, base, and drain.

In a millivoltmeter, the diodes and the capacitor are used in ________ parts of the circuit.

________ can be used as a voltage-controlled voltage source.

In photodiodes, an increase in light intensity ________ the reverse current.

The p-n junction of a tunnel diode is doped at a level from ________ to ________ times that of a typical semiconductor diode.

In general, silicon ________.

The E-MOSFET has no physical channel.

One advantage of a JFET over the BJT is its high input resistance.

The MOSFET has no pn junction.

An OL indication on an advanced digital meter indicates ________ while checking a transistor.

The common-collector configuration has a ________ input impedance and a ________ output impedance.

The leads of a transistor are typically made of ________.

If the positive lead of an ohmmeter is connected to the base and the negative lead to the emitter, a low resistance reading would indicate a ________ transistor and a high resistance reading would indicate a ________ transistor.

Typical values of voltage amplification for the common-base configurations vary from ________ and the current gain is always ________ .

If a value of is specified for a particular transistor configuration it will normally be used for ________ calculations.

The doping of the sandwiched layer is ________ that of the outer layers.

The frequency of the 566 VCO is set by ________.

The 311 voltage comparator can operate from ________.

In interfacing circuitry, a receiver provides ________ input impedance to minimize loading of the input signal.

In an emitter-follower, the voltage gain is ________.

In ________ configuration(s) a depletion-type MOSFET can operate in enhancement mode.

A class C amplifier is a linear amplifier.

Class AB operation always requires a dual (+/ ) supply.

In ________ power amplifiers, the output signal varies for a full 360 of the cycle.

The arrow on the schematic symbol for a MOSFET indicates the channel material type.

A VMOS device can handle higher power and voltage than a conventional MOSFET.

It is not necessary to exercise any particular care in handling a MOSFET.

The Q-point in a JFET with voltage-divider bias is more stable than in a self-biased JFET.

In the saturation region the collector-base junction is ________-biased and the base-emitter junction is ________-biased for a transistor.

The base current is the ________ of the emitter and collector currents.

The outer layers of a transistor are ________ the sandwiched layer.

________is the least stabilized circuit.

One of the most important characteristics of the FET is its ________ impedance.

The pinch-off voltage continues to drop in a ________ manner as VGS becomes more and more negative.

In a curve tracer, the ________ reveals the distance between the VGS curves for the n-channel device.

Voltage multipliers take a dc input voltage, and provide a dc output voltage at a multiple of the input.

The load line is defined by the ________ and a characteristic curve is defined by the ________.

The slope of the load line depends on the ________.

Calculate the output voltage if V1 = V2 = 700 mV.

The input impedance of a voltage buffer is ________.

What is the function of a ladder network?

The feedback signal in a(n) ________ oscillator is derived from a capacitive voltage divider in the LC circuit.

For frequencies up to 1 MHz, the ________ is the most widely used type of sinusoidal RC oscillator.

In a full-wave rectifier, the dc voltage level is ________ the ripple voltage level.

Which of the following semiconductor materials is (are) used for manufacturing solar cells?

A Schottky diode has ________ level of current at the same applied bias compared to that of the p-n junction at both the forward- and reverse-bias regions.

The p-n junction of a tunnel diode is doped at a level from to times that of a typical semiconductor diode.

The common-collector configuration has a input impedance and a output impedance.

If the positive lead of an ohmmeter is connected to the base and the negative lead to the emitter, a low resistance reading would indicate a transistor and a high resistance reading would indicate a transistor.

Typical values of voltage amplification for the common-base configurations vary from and the current gain is always .

In the saturation region the collector-base junction is -biased and the base-emitter junction is -biased for a transistor.

The load line is defined by the and a characteristic curve is defined by the .