1728 + Mcqs in Electronics McqOptions

1.	The dependency notation " 1" inside a block stands for the ________ operation.
A.	OR
B.	XOR
C.	AND
D.	XNOR
Answer» B. XOR

Discussion

2.	If we use an AND gate to inhibit a signal from passing, one of the inputs must be _________.
A.	LOW
B.	HIGH
C.	inverted
D.	floating
Answer» B. HIGH

Discussion

3.	The basic instrumentation amplifier has ________ input(s).
A.	1
B.	2
C.	capacitive
D.	resistive
Answer» C. capacitive

Discussion

4.	A Schmitt trigger has _________.
A.	no trigger points
B.	one trigger point
C.	two trigger points
D.	three trigger points
Answer» E.

Discussion

5.	A Schmitt trigger is a comparator with _______.
A.	modulation
B.	a closed-loop gain less than one
C.	hysteresis
D.	a high threshold value
Answer» D. a high threshold value

Discussion

6.	The precision rectifier circuit is designed to _________.
A.	rectify waveforms with very large voltage swings
B.	rectify waveforms with very small voltage swings
C.	rectify precision waveforms
D.	amplify and rectify waveforms
Answer» C. rectify precision waveforms

Discussion

7.	A(n) ________ amplifier is used if the application requires a high sensitivity to low-level signals and protection from high-voltage associated circuits.
A.	basic instrumentation
B.	operational transconductance
C.	log/antilog amplifier
D.	isolation
Answer» E.

Discussion

8.	Typical isolation amplifiers use optical coupling.
A.	True
B.	False
Answer» C.

Discussion

9.	OTA stands for Operational Transistor Amplifier.
A.	True
B.	False
Answer» C.

Discussion

10.	There are five steps in the PLD prototyping process.
A.	True
B.	False
Answer» B. False

Discussion

11.	SLDs and PLDs are digital logic ICs that can have their function changed through programming.
A.	True
B.	False
Answer» C.

Discussion

12.	Both the AND and OR arrays in a PAL are programmable.
A.	True
B.	False
Answer» C.

Discussion

13.	A full adder adds ____.
A.	two 2-bit binary numbers
B.	two 4-bit binary numbers
C.	two single bits and one carry bit
D.	two 2-bit numbers and one carry bit
Answer» D. two 2-bit numbers and one carry bit

Discussion

14.	The bits of a number that tell how large the number is are called ____________________.
A.	carry bits
B.	magnitude bits
C.	sign bits
D.	most significant bits
Answer» C. sign bits

Discussion

15.	Two 4-bit adders could be cascaded to form a(n) ___________.
A.	16-bit parallel-adder circuit
B.	8-bit parallel-adder circuit
C.	full-adder circuit
D.	arithmetic-logic unit
Answer» C. full-adder circuit

Discussion

16.	An input to the mode pin of an arithmetic-logic unit (ALU) determines if the function will be _________.
A.	one's complemented
B.	positive or negative
C.	with or without carry
D.	arithmetic or logic
Answer» E.

Discussion

17.	In binary number systems the sign of a number is indicated by _________.
A.	using a 0 (zero) bit in front of negative numbers
B.	inverting the bits if the number is negative
C.	including a sign bit along with the magnitude bits
D.	placing a negative sign in front of the number
Answer» D. placing a negative sign in front of the number

Discussion

18.	CAD software can be used to create a detailed logic circuit that will perform like an actual PLD.
A.	True
B.	False
Answer» B. False

Discussion

19.	A FPGA is an array of programmable logic blocks that are interconnected by OR gates.
A.	True
B.	False
Answer» C.

Discussion

20.	A JFET can be either a current-controlled device or a voltage-controlled device.
A.	True
B.	False
Answer» B. False

Discussion

21.	A JFET has 3 terminals: gate, drain, and source.
A.	True
B.	False
Answer» B. False

Discussion

22.	Using the two's complement number system we can add numbers with like signs and obtain the correct result.
A.	True
B.	False
Answer» C.

Discussion

23.	Two half adders can be combined to form a full adder with no additional gates.
A.	True
B.	False
Answer» C.

Discussion

24.	An enhancement-type MOSFET or E-MOSFET can be turned on when the channel is depleted.
A.	True
B.	False
Answer» C.

Discussion

25.	One advantage of using the 2's complement system to represent signed numbers is that you ___________.
A.	can perform subtraction by performing addition
B.	can perform addition by performing subtraction
C.	can perform division through repeated subtraction
D.	none of the above
Answer» B. can perform addition by performing subtraction

Discussion

26.	A full adder adds three bits, a half adder adds 1-1/2 bits.
A.	True
B.	False
Answer» C.

Discussion

27.	All digital systems that perform arithmetic operations must indicate _______ and ________ for numbers.
A.	size, base
B.	sign, magnitude
C.	sign, base
D.	magnitude, base
Answer» C. sign, base

Discussion

28.	The carry propagation delay in 4-bit full-adder circuits ____________.
A.	is normally not a consideration because the delays are usually in the nanosecond range
B.	is cumulative for each stage and limits the speed at which arithmetic operations are performed
C.	decreases in direct ratio to the total number of full-adder stages
D.	increases in direct ratio to the total number of full-adder stages, but is not a factor in limiting the speed of arithmetic operations
Answer» C. decreases in direct ratio to the total number of full-adder stages

Discussion

29.	Breakdown voltage and pinch-off voltage of a JFET are different terms for the same voltage level.
A.	True
B.	False
Answer» C.

Discussion

30.	Transconductance is also called mutual conductance.
A.	True
B.	False
Answer» B. False

Discussion

31.	A JFET is very similar to a BJT.
A.	True
B.	False
Answer» C.

Discussion

32.	A MOSFET has an isolated gate.
A.	True
B.	False
Answer» B. False

Discussion

33.	The gate-biased JFET characteristic curve includes IDS.
A.	True
B.	False
Answer» C.

Discussion

34.	In a voltage-divider JFET circuit, ID is a maximum when VGS = 0 V.
A.	True
B.	False
Answer» B. False

Discussion

35.	The amount of gate voltage needed to turn the JFET completely off is called VGS(OFF).
A.	True
B.	False
Answer» B. False

Discussion

36.	A common-drain configured JFET is also called a source-follower.
A.	True
B.	False
Answer» B. False

Discussion

37.	If the drain, source, and channel are all a p-type material, and the transistor operates in both modes, this is a p-channel E-MOSFET.
A.	True
B.	False
Answer» C.

Discussion

38.	A D-MOSFET cannot be biased using zero biasing.
A.	True
B.	False
Answer» C.

Discussion

39.	Isolation amps are named as such because they are sealed for protection from outside environmental damage.
A.	True
B.	False
Answer» C.

Discussion

40.	To construct an instrumentation amplifier, two op-amps and seven resistors are needed.
A.	True
B.	False
Answer» C.

Discussion

41.	Clampers are often called peak detectors.
A.	True
B.	False
Answer» C.

Discussion

42.	An OTA is primarily a current-to-voltage amplifier.
A.	True
B.	False
Answer» C.

Discussion

43.	Signed binary numbers have one bit that represents the sign, with the remaining bits representing the magnitude.
A.	True
B.	False
Answer» B. False

Discussion

44.	The operands in a subtraction operation are the subend and the minuend.
A.	True
B.	False
Answer» C.

Discussion

45.	A technique to speed parallel addition by eliminating the delay caused by the carry bit propagation is called fast carry, or look-ahead carry.
A.	True
B.	False
Answer» B. False

Discussion

46.	End around carry is an operation in 1's complement subtraction where a 1 is added to the sum of the 1's complement of both numbers.
A.	True
B.	False
Answer» C.

Discussion

47.	Most of the input signals applied to a computer for storage or processing are digital in nature.
A.	True
B.	False
Answer» C.

Discussion

48.	The coded group of pulses in a digital electronic circuit consists of a series of HIGH and LOW voltages.
A.	True
B.	False
Answer» B. False

Discussion

49.	The operands in an addition operation consist of the augend and the addend.
A.	True
B.	False
Answer» B. False

Discussion

50.	With Ohm's law, no change in resistance means that current and voltage will be:
A.	directly proportional
B.	unable to produce energy
C.	the same
D.	inversely proportional
Answer» B. unable to produce energy

Discussion

Explore topic-wise MCQs in Testing Subject.

The dependency notation " 1" inside a block stands for the ________ operation.

If we use an AND gate to inhibit a signal from passing, one of the inputs must be _________.

The basic instrumentation amplifier has ________ input(s).

A Schmitt trigger has _________.

A Schmitt trigger is a comparator with _______.

The precision rectifier circuit is designed to _________.

A(n) ________ amplifier is used if the application requires a high sensitivity to low-level signals and protection from high-voltage associated circuits.

Typical isolation amplifiers use optical coupling.

OTA stands for Operational Transistor Amplifier.

There are five steps in the PLD prototyping process.

SLDs and PLDs are digital logic ICs that can have their function changed through programming.

Both the AND and OR arrays in a PAL are programmable.

A full adder adds ____.

The bits of a number that tell how large the number is are called ____________________.

Two 4-bit adders could be cascaded to form a(n) ___________.

An input to the mode pin of an arithmetic-logic unit (ALU) determines if the function will be _________.

In binary number systems the sign of a number is indicated by _________.

CAD software can be used to create a detailed logic circuit that will perform like an actual PLD.

A FPGA is an array of programmable logic blocks that are interconnected by OR gates.

A JFET can be either a current-controlled device or a voltage-controlled device.

A JFET has 3 terminals: gate, drain, and source.

Using the two's complement number system we can add numbers with like signs and obtain the correct result.

Two half adders can be combined to form a full adder with no additional gates.

An enhancement-type MOSFET or E-MOSFET can be turned on when the channel is depleted.

One advantage of using the 2's complement system to represent signed numbers is that you ___________.

A full adder adds three bits, a half adder adds 1-1/2 bits.

All digital systems that perform arithmetic operations must indicate _______ and ________ for numbers.

The carry propagation delay in 4-bit full-adder circuits ____________.

Breakdown voltage and pinch-off voltage of a JFET are different terms for the same voltage level.

Transconductance is also called mutual conductance.

A JFET is very similar to a BJT.

A MOSFET has an isolated gate.

The gate-biased JFET characteristic curve includes IDS.

In a voltage-divider JFET circuit, ID is a maximum when VGS = 0 V.

The amount of gate voltage needed to turn the JFET completely off is called VGS(OFF).

A common-drain configured JFET is also called a source-follower.

If the drain, source, and channel are all a p-type material, and the transistor operates in both modes, this is a p-channel E-MOSFET.

A D-MOSFET cannot be biased using zero biasing.

Isolation amps are named as such because they are sealed for protection from outside environmental damage.

To construct an instrumentation amplifier, two op-amps and seven resistors are needed.

Clampers are often called peak detectors.

An OTA is primarily a current-to-voltage amplifier.

Signed binary numbers have one bit that represents the sign, with the remaining bits representing the magnitude.

The operands in a subtraction operation are the subend and the minuend.

A technique to speed parallel addition by eliminating the delay caused by the carry bit propagation is called fast carry, or look-ahead carry.

End around carry is an operation in 1's complement subtraction where a 1 is added to the sum of the 1's complement of both numbers.

Most of the input signals applied to a computer for storage or processing are digital in nature.

The coded group of pulses in a digital electronic circuit consists of a series of HIGH and LOW voltages.

The operands in an addition operation consist of the augend and the addend.

With Ohm's law, no change in resistance means that current and voltage will be:

All digital systems that perform arithmetic operations must indicate _ and __ for numbers.