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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 open circuit allows current to flow.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Voltage and Current
2.
Voltage sources are added when they are series-opposing.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Series Circuits
3.
What is the reluctance of a material that has a length of 0.045 m, a cross-sectional area of 0.015 m2, and a permeability of 2500 µWb/At·m?
833.33 µAt/Wb
0.27 At/Wb
1200 At/Wb
More information is needed in order to find the reluctance.
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Magnetism and Electromagnetism
4.
What is the total current for a 5 MHz, 1 Vac circuit that consists of a 27 pF capacitor and a 1 k resistor connected in parallel?
459 A
647 A
1.31 mA
1.85 mA
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Capacitors
5.
Capacitors are often used as filters.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Capacitors
6.

What is the current through XC1 in the given circuit?

32.2 mA
16 mA
12 mA
48 mA
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : RC Circuits
7.
Inductors are not as versatile as capacitors.
True
False
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Inductors
8.
What is the magnitude of the phase angle of a 24 Vac parallel RL circuit when R = 45 omega.gif and XL = 1100 omega.gif?
0.001°
2.3°
87.6°
89.9°
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : RL Circuits
9.
What is the resonance frequency?

31.8 Hz
71 Hz
7.1 kHz
31.8 kHz
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(Not Answered)
Correct Answer: Option
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Learn more problems on : RLC Circuits and Resonance
10.
The impedance is 9684 .

True
False
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(Not Answered)
Correct Answer: Option
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Learn more problems on : RLC Circuits and Resonance
11.
In a repetitive-pulse RC integrator circuit, what would the steady-state voltage equal at the end of the fifth pulse? Assume a Vin of 20 V.
1.46 V
14.62 V
20 V
0 V
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Time Response of Reactive Circuits
12.
What is the percent of regulation if Vnl = 20 V and Vfl = 19.8 V?
0%
1%
.1%
5%
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Diodes and Applications
13.
Which type of JFET bias requires a negative supply voltage?
feedback
source
gate
voltage divider
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Field Effect Transistors (FET)
14.
When testing an n-channel D-MOSFET, resistance G to D = , resistance G to S = , resistance D to SS = and 500 , depending on the polarity of the ohmmeter, and resistance D to S = 500 . What is wrong?
short D to S
open G to D
open D to SS
nothing
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Field Effect Transistors (FET)
15.
A MOSFET has an isolated gate.
True
False
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Field Effect Transistors (FET)
16.
One advantage of voltage-divider bias is that the dependency of drain current, ID, on the range of Q points is _________.
reduced
increased
not affected
none of the above
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Learn more problems on : Field Effect Transistors (FET)
17.
Convert the decimal number 151.75 to binary.
10000111.11
11010011.01
00111100.00
10010111.11
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Number Systems and Codes
18.
A NAND gate consists of an AND gate and an OR gate connected in series with each other.
True
False
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Logic Gates
19.
A nonvolatile type of memory that can be programmed and erased in sectors, rather than one byte at a time is:
flash memory
EPROM
EEPROM
MPROM
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Semiconductor Memory
20.
The software used to drive microprocessor-based systems is called:
assembly language programs
firmware
BASIC interpreter instructions
flowchart instructions
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Computer Hardware and Software
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