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Online Electronics Test - Electronics Test - Random

Instruction:
  • This is a FREE online test. Beware of scammers who ask for money to attend this test.
  • Total number of questions: 20.
  • Time allotted: 30 minutes.
  • Each question carries 1 mark; there are no negative marks.
  • DO NOT refresh the page.
  • All the best!

Marks : 2/20

Total number of questions
20
Number of answered questions
0
Number of unanswered questions
20
Test Review : View answers and explanation for this test.
1.
Multiplying 5 × 106 by 4 × 103 results in 20 × 1018.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Quantities and Units
2.
What electromotive force would cause 20 A of current to flow through a 500 omega.gif resistor?
0.04 V
2.5 V
25.0 V
10,000 V
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Ohm's Law
3.
A series circuit current:
remains the same through each component
is the same as the individual resistances
is subtracted by each component
varies through each component
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Series Circuits
4.

Which circuit fault do the meter readings in the given figure indicate?

The 1 komega.gif resistor is open.
The 4.7 komega.gif resistor is open.
The 2.2 komega.gif resistor is open.
The 3.3 komega.gif resistor is open.
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Series-Parallel Circuits
5.
What are the branch currents I2 and I3?

I2 = 4 mA, I3 = 2 mA
I2 = 4.5 mA, I3 = 2.5 mA
I2 = 2.5 mA, I3 = 1.5 mA
I2 = 5.5 mA, I3 = 3.5 mA
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Series-Parallel Circuits
6.
A Hall effect sensor
exists only in theory
is a noncontacting magnetic sensor
can operate only a few times before failure
produces very large voltages
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Magnetism and Electromagnetism
7.
Ferromagnetic materials have pre-existing magnetic fields.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Magnetism and Electromagnetism
8.
Between any two time constants, the charge on a capacitor changes about 63%.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Capacitors
9.
The output of the secondary winding is 15 V.

True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Inductors
10.
When a parallel tank circuit is used in series with an output load resistor the filter is ______.
low-pass
band-stop
band-pass
high-pass
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : RLC Circuits and Resonance
11.
What is a varistor?
a voltage-dependent resistor
a voltage-dependent diode
a current-dependent resistor
a current-dependent diode
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Diodes and Applications
12.
Clampers are often called peak detectors.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Special-Purpose Op-Amp Circuits
13.
How many connections does a potentiometer have?
1
2
3
4
Your Answer: Option
(Not Answered)
Correct Answer: Option
Explanation:
A potentiometer uses three connections, as opposed to a rheostat, which only employs two. Having three connections allows the potentiometer to vary voltage. Both the potentiometer and the rheostat are classified as variable resistors.
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Learn more problems on : Resistance and Power
14.
The magnitude that an alternation varies from zero is called its:
altitude
amplitude
attitude
polarity
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Alternating Current vs Direct Current
15.
Which of the following cannot actually move?
majority carriers
ions
holes
free electrons
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Semiconductor Principles
16.
Junction Field Effect Transistors (JFET) contain how many diodes?
4
3
2
1
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Field Effect Transistors (FET)
17.
A common-drain configured JFET is also called a source-follower.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Field Effect Transistors (FET)
18.
Due to the extremely low power requirements of CMOS logic circuits, any number of CMOS and TTL gates can be interconnected.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Standard Logic Devices (SLD)
19.
The time needed for a pulse to increase from 10% to 90% of its amplitude defines:
pulse width
propagation delay
rise time
duty cycle
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Testing and Troubleshooting
20.
An 8-bit digital-to-analog converter (DAC) has a resolution of 0.125 V.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
Discuss about this problem : Discuss in Forum
Learn more problems on : Analog and Digital Converters
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