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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.
An ammeter is used to measure
voltage
current
resistance
All of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Voltage and Current
2.
The term used to designate electrical pressure is:
voltage
current
resistance
conductance
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Voltage and Current
3.
When a Wheatstone bridge is in a balanced condition, the center voltmeter in the bridge will read:
twice the source voltage
the same as the source voltage
zero volts
half the source voltage
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Series-Parallel Circuits
4.
The ability of a material to maintain a magnetized state (without the presence of a magnetizing force) is called retentivity.
True
False
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Correct Answer: Option
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Learn more problems on : Magnetism and Electromagnetism
5.

What is the peak voltage across R3 in the given circuit?

1.2 V
5 V
7 V
12 V
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Correct Answer: Option
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Learn more problems on : Alternating Current and Voltage
6.
The instantaneous voltage at 120° on a 5 V peak sine wave equals about –4.33 V.
True
False
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Correct Answer: Option
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Learn more problems on : Alternating Current and Voltage
7.
Opposition to current flow without the dissipation of energy is called:
resistance
inductive reactance
counter emf
impedance
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Inductors
8.
What term is used to describe the action of magnetic flux from one circuit that cuts across the conductors of another circuit?
self-inductance
rectification
mutual inductance
magnetism
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Correct Answer: Option
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Learn more problems on : Inductors
9.
In a transformer, what will happen to the primary current if the secondary magnetic field increases?
Ip will increase.
Ip will be canceled.
Ip will remain the same.
Ip will decrease.
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Learn more problems on : Inductors
10.
A practical inductor
has inductance
has winding resistance
has winding capacitance
all of the above
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Correct Answer: Option
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Learn more problems on : Inductors
11.
Series resonance happens when _____.
XC = XC
XL = XC
XL = XB
XT = R
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Correct Answer: Option
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Learn more problems on : RLC Circuits and Resonance
12.

In the given circuit, the secondary voltage is in phase with the primary voltage.

True
False
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Correct Answer: Option
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Learn more problems on : Transformers
13.
A(n) ___ is sometimes constructed as a variable transformer.
autotransformer
center-tapped transformer
multiple-tap transformer
multiple-winding transformer
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Correct Answer: Option
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Learn more problems on : Transformers
14.

The reference voltage for the comparator in the given circuit equals ______.

0 V
+8.8 V
+16 V
+7.2 V
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Correct Answer: Option
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Learn more problems on : Basic Op-Amp Circuits
15.
An enhancement-type MOSFET or E-MOSFET can be turned on when the channel is depleted.
True
False
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Field Effect Transistors (FET)
16.
A TRIAC can be triggered or activated by either a positive or a negative input gate trigger.
True
False
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Learn more problems on : Thyristors and Tranducers
17.
Each "1" entry in a K-map square represents ______________.
a HIGH output on the truth table for all input combinations
a LOW output for all possible HIGH input conditions
a DON'T CARE condition for all possible input truth table combinations
a HIGH for each input truth table condition that produces a HIGH output
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Correct Answer: Option
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Learn more problems on : Logic Circuit Simplification
18.
Both the AND and OR arrays in a PAL are programmable.
True
False
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Correct Answer: Option
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Learn more problems on : Programmable Logic Devices (PLD)
19.
In an asynchronous counter, each state is clocked by the same pulse.
True
False
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Sequential Logic Circuits
20.
The first part of a machine language instruction that specifies the operation to be performed is called a(n) __________.
mnemonic
opcode
interrupt
instruction cycle
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Computer Hardware and Software
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