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.

When considering conventional current versus electron current flow:

A.
electron current flow came first
B.
protons move in conventional current flow
C.
conventional current flow came first
D.
the direction of current is the same in both methods

Your Answer: Option (Not Answered)

Correct Answer: Option C

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2.

An air-core inductor has a metal core.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Inductors

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3.

The only way to close an SCR is with:

A.
a trigger input applied to the gate
B.
forward breakover voltage
C.
low-current dropout
D.
valley voltage

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Thyristors and Tranducers

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4.

Which is the DIAC?

A.
mca14_10012a1.gif
B.
mca14_10012b1.gif
C.
mca14_10012c1.gif
D.
mca14_10012d1.gif

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Thyristors and Tranducers

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5.

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

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Arithmetic Operations and Circuits

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6.

A loaded transformer will achieve mutual induction when:

A.
secondary current increase causes a primary current decrease
B.
primary current is increased by an increase in secondary current
C.
primary current is decreased by an increase in secondary current
D.
secondary current decrease causes a primary current increase

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Inductors

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7.

Find VR and VL.

mcq8_1034_1.gif

A.
VR = 41.6 V, VL = 78.4 V
B.
VR = 48 V, VL = 110 V
C.
VR = 56 V, VL = 106 V
D.
VR = 60 V, VL = 60 V

Your Answer: Option (Not Answered)

Correct Answer: Option C

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8.

It takes two memory locations (16 bits each) to store an address in the 8085 system.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Computer Hardware and Software

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9.

By increasing the resistance of a coil you can increase the Q of the coil at resonance.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : RLC Circuits and Resonance

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10.

The resolution of a 0–5 V 6-bit digital-to-analog converter (DAC) is:

A.
63%
B.
64%
C.
1.56%
D.
15.6%

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Analog and Digital Converters

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11.

What would these meter readings indicate about the circuit in the given circuit?

Meter Readings: I = 7.6 mA, V = 12 V

A.
R1 is open.
B.
R2 is open.
C.
The fuse is open.
D.
The circuit is operating normally.

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Parallel Circuits

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12.

A commonly used pentavalent material is:

A.
arsenic
B.
boron
C.
gallium
D.
neon

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Semiconductor Principles

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13.

In order to sustain oscillations in a feedback oscillator, the gain should be _________ so the Acl _______.

A.
reduced, equals one
B.
reduced, is less than one
C.
increased, is more than one
D.
increased, is much greater than one

Your Answer: Option (Not Answered)

Correct Answer: Option A

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14.

A test equipment item that has the ability to produce either square, triangular, or sawtooth waveforms is called:

A.
a function generator
B.
a radio frequency generator
C.
an audio frequency generator
D.
a frequency meter or counter

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Alternating Current vs Direct Current

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15.

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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16.

A series circuit schematic is recognized because all the components are connected:

A.
diagonally across the page
B.
in a uniform vertical manner
C.
end to end in a "string"
D.
horizontally across the page

Your Answer: Option (Not Answered)

Correct Answer: Option C

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17.

7450 × 10–5 amperes equals 74.5 ___.

A.
A
B.
mA
C.
mu.gifA
D.
nA

Your Answer: Option (Not Answered)

Correct Answer: Option B

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18.

The signal voltage gain of an amplifier, AV, is defined as __________.

A.
fba12_1005a1.gif
B.
AV = IC x RC
C.
fba12_1005c1.gif
D.
fba12_1005d1.gif

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Bipolar Junction Transistors (BJT)

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19.

Heat produced by a resistor is generally a desirable effect.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Ohm's Law

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20.

The ___ oscillator takes advantage of the piezoelectric effect.

A.
crystal
B.
Hartley
C.
Colpitts
D.
RC

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Transistors and Applications

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