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.

If an electronic component fails by developing an open circuit, the current will __________.

A.
increase
B.
decrease
C.
cease
D.
not change

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Voltage and Current

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2.

With a common-collector (C-C) amplifier the input is applied to the base and the output is taken from the emitter.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Bipolar Junction Transistors (BJT)

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3.

Ohm's law describes the mathematical relationship between

A.
ohms, kilohms, and megohms
B.
resistor size and resistor value
C.
resistance, voltage, and current
D.
none of the above

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Ohm's Law

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4.

If the voltage in the given circuit was cut in half, what would the current equal?

A.
10 mA
B.
30 mA
C.
60 mA
D.
90 mA

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Ohm's Law

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5.

In digital electronic circuits, information is first converted to a coded group of pulses.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Analog to Digital

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6.

In a series–parallel circuit, individual component power dissipations are calculated using:

A.
individual component parameters
B.
a percent of the voltage division ratio squared
C.
total current squared multiplied by the resistor values
D.
a percent of the total power depending on resistor ratios

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Series-Parallel Circuits

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7.

Why is heat produced in a diode?

A.
due to current passing through the diode
B.
due to voltage across the diode
C.
due to the power rating of the diode
D.
due to the PN junction of the diode

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Diodes and Applications

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8.

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

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Special-Purpose Op-Amp Circuits

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9.

An ammeter is used to measure

A.
voltage
B.
current
C.
resistance
D.
All of the above

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Voltage and Current

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10.

AC effective voltage is named:

A.
average
B.
peak
C.
peak-to-peak
D.
root mean square

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Alternating Current vs Direct Current

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11.

The ___ cannot change instantaneously in an inductor.

A.
voltage
B.
current
C.
power
D.
magnetic field

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Inductors

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12.

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The feedback resistor has a value of ______ in the given circuit

A.
2 komega.gif
B.
10.5 komega.gif
C.
21 komega.gif
D.
40 komega.gif

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Operational Amplifiers

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13.

The use of triggered sweep when using an oscilloscope provides more accuracy in which area?

A.
frequency
B.
amplitude
C.
graticule activity
D.
timing

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Testing and Troubleshooting

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14.

Refer the given circuits. Which circuit is known as an OTA?

A.
a
B.
b
C.
c
D.
d

Your Answer: Option (Not Answered)

Correct Answer: Option D

Learn more problems on : Special-Purpose Op-Amp Circuits

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15.

The language understood by the microprocessor is called assembly language.

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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16.

Logic gate circuits contain predictable gate functions that open their outputs.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Logic Gates

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17.

An S-R flip-flop can be triggered by ______, ______, or ________.

A.
HIGHs, LOWs, PRESETs
B.
edges, levels, pulses
C.
HIGHs, LOWs, CLEARs
D.
SETs, RESETs, HIGHs

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Flip-Flops and Timers

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18.

ECL gates are noted for their high frequency capability and small output voltage swing.

A.
True
B.
False

Your Answer: Option (Not Answered)

Correct Answer: Option A

Learn more problems on : Standard Logic Devices (SLD)

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19.

A magnetic field has:

A.
polar fields
B.
lines of force
C.
magnetomotive force
D.
lines of reluctance

Your Answer: Option (Not Answered)

Correct Answer: Option B

Learn more problems on : Inductors

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20.

A potentiometer has how many leads?

A.
1
B.
2
C.
3
D.
4

Your Answer: Option (Not Answered)

Correct Answer: Option C

Learn more problems on : Resistance and Power

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