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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.
If an electrical system is compared to a fluid system, the electrical current corresponds to the:
pressure
pump
water wheel
water flow
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Voltage and Current
2.
To find the total resistance in series, add the individual resistances.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Series Circuits
3.
The ability of a material to maintain a magnetized state (without the presence of a magnetizing force) is called hysteresis.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Magnetism and Electromagnetism
4.
In an RC circuit, true power (PR) equals:
VS × I
I2R
VT × RT
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Capacitors
5.

The given image is a _____ capacitor.

0.33 pF
0.00033 mu.gifF
33,000 pF
0.33 mu.gifF
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Capacitors
6.

The true power in the given circuit equals ___.

48.48 mW
296.93 mW
280.64 mW
96.98 mW
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Correct Answer: Option
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Learn more problems on : RC Circuits
7.
A step-up transformer will have a turns ratio greater than 1.
True
False
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Correct Answer: Option
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Learn more problems on : Inductors
8.
Electromagnetic induction is the generation of _________ from __________.
magnetism, electricity
electricity, electricity
electricity, magnetism
magnetism, magnetism
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Inductors
9.
An essential requirement of a feedback oscillator is a phase shift around the feedback loop of 360°.
True
False
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Correct Answer: Option
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Learn more problems on : Transistors and Applications
10.
To operate properly, an oscillator requires an external ac input signal.
True
False
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Correct Answer: Option
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Learn more problems on : Basic Op-Amp Circuits
11.
The letter in the Greek alphabet used to represent wavelength is __________.
lambda
theta
omega
delta
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Alternating Current vs Direct Current
12.
What is an energy gap?
the space between two orbital shells
the energy equal to the energy acquired by an electron passing a 1 V electric field
the energy band in which electrons can move freely
an energy level at which an electron can exist
Your Answer: Option
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Correct Answer: Option
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Learn more problems on : Semiconductor Principles
13.
The double-inversion rule states that if a variable is inverted twice, then the variable will be back to its original state.
True
False
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Logic Circuit Simplification
14.
A check of all power supply voltages should be made during the ________ method of troubleshooting.
half-split
diagnosis
repair
final test
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Correct Answer: Option
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Learn more problems on : Testing and Troubleshooting
15.
The control of digital circuits is usually achieved with _________.
random pulses
clock signals
sophisticated gating
selected frequencies
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Learn more problems on : Testing and Troubleshooting
16.
The general function of a decoder is to activate one or more circuit outputs upon detection of a particular digital state.
True
False
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Combinational Logic Circuits
17.
An astable multivibrator is a circuit that:
has two stable states
is free-running
produces a continuous output signal
is free-running and produces a continuous output signal
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Correct Answer: Option
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Learn more problems on : Flip-Flops and Timers
18.
The number that is a unique representation of the location of data is its address.
True
False
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Semiconductor Memory
19.
The difference between analog voltage represented by two adjacent digital codes, or the analog step size, is the:
quantization
accuracy
resolution
monotonicity
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Correct Answer: Option
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Learn more problems on : Analog and Digital Converters
20.
What is the difference between mnemonic codes and machine codes?
There is no difference.
Machine codes are in binary, mnemonic codes are in shorthand English.
Machine codes are in shorthand English, mnemonic codes are in binary.
Machine codes are in shorthand English, mnemonic codes are a high-level language.
Your Answer: Option
(Not Answered)
Correct Answer: Option
Discuss about this problem : Discuss in Forum
Learn more problems on : Computer Hardware and Software
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