Online Electronics Test - Electronics Test - Random



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Instruction:

  • Total number of questions : 20.
  • Time alloted : 30 minutes.
  • Each question carry 1 mark, no negative marks.
  • DO NOT refresh the page.
  • All the best :-).

1.

At any given time in an intrinsic piece of semiconductor material at room temperature

A.
electrons drift randomly
B.
recombination occurs
C.
holes are created
D.
All of the above

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Diodes and Applications

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2.

In a power supply diagram, which block indicates a pulsating dc output?

A.
transformer
B.
filter
C.
rectifier
D.
regulator

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Diodes and Applications

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3.

For an S-R flip-flop to be SET or RESET, the respective input must be __________.

A.
LOW
B.
HIGH
C.
installed with steering diodes
D.
in parallel with a limiting resistor

Your Answer: Option (Not Answered)

Correct Answer: Option B

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4.

A conductor's cross-sectional area in circular mils for onehalf.gif inch is:

A.
500 cmils
B.
100,000 cmils
C.
1,000,000 cmils
D.
500,000,000 cmils

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Resistance and Power

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5.

The Q point on a load line may be used to determine:

A.
VC
B.
VCC
C.
VB
D.
IC

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Bipolar Junction Transistors (BJT)

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6.

The output of a NAND gate is the same as the inverted output of an AND gate.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Logic Gates

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7.

The total resistance in the circuit is 1.6 k.

tfq5_1003_1.gif

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Series-Parallel Circuits

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8.

A capacitor is charged when one of its plates has more electrons than the other plate.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

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9.

If a sine wave's frequency equals 25 MHz, its period equals _____.

A.
25 µs
B.
25 ms
C.
4 µs
D.
40 ns

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Alternating Current and Voltage

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10.

A sine wave reaches maximum positive voltage at:

A.
90°
B.
C.
–90°
D.
360°

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Alternating Current vs Direct Current

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11.

How many inputs are required for a 1-of-10 BCD decoder?

A.
4
B.
8
C.
10
D.
1

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Combinational Logic Circuits

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12.

What is the inductive reactance?

mcq8_1033_1.gif

A.
5.2 omega.gif
B.
7.5 omega.gif
C.
1.3 komega.gif
D.
7.5 komega.gif

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Inductors

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13.

Special diodes designed to conduct in the reverse direction are called _______________ diodes.

A.
zener
B.
varactor
C.
LED
D.
switching

Your Answer: Option (Not Answered)

Correct Answer: Option A

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14.

The small amount of ac signal present on the output of a filtering network for a dc power supply is known as ________.

A.
pulsating dc
B.
trickle
C.
ripple
D.
waffle

Your Answer: Option (Not Answered)

Correct Answer: Option C

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15.

The __________ is defined as the ratio of a pulse width (positive or negative pulse or cycle) to the overall period of time of the wave.

A.
pulse width
B.
duty cycle
C.
phase shift
D.
active ratio

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Alternating Current vs Direct Current

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16.

A code in which each individual digit of a decimal number is represented by a 4-bit binary number is _________.

A.
binary coded decimal
B.
binary
C.
hexadecimal
D.
seven-segment code

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Combinational Logic Circuits

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17.

In an n-channel JFET, what will happen at the pinch-off voltage?

A.
the value of VDS at which further increases in VDS will cause no further increase in ID
B.
the value of VGS at which further decreases in VGS will cause no further increases in ID
C.
the value of VDG at which further decreases in VDG will cause no further increases in ID
D.
the value of VDS at which further increases in VGS will cause no further increases in ID

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Field Effect Transistors (FET)

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18.

When an input delta of 2 V produces a transconductance of 1.5 mS, what is the drain current delta?

A.
666 mA
B.
3 mA
C.
0.75 mA
D.
0.5 mA

Your Answer: Option (Not Answered)

Correct Answer: Option B

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19.

The term buffer/driver signifies the ability to provide low output currents to drive light loads.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Standard Logic Devices (SLD)

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20.

Which circuit is represented by the frequency response curve in the given figure?

A.
High-pass filter
B.
Low-pass filter
C.
Band-pass filter
D.
Band-stop filter


Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : RC Circuits

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