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Online Electronic Devices Test - Electronic Devices Test 8

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.
The full-wave voltage doubler provides ________ filtering action than (as) the half-wave voltage doubler.
better
poorer
the same
None of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Diode Applications
2.
The dc emitter current of a transistor is 8 mA. What is the value of re?
320
13.3 k
3.125
5.75
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : BJT Amplifiers
3.
Refer to this portion of a specification sheet. Determine the values of reverse-gate-source voltage and gate current if the FET was forced to accept it.

25 Vdc, –200 nAdc
–25 Vdc, 10 mAdc
–6 Vdc, –1.0 nAdc
None of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : FET Devices
4.
The silicon dioxide (SiO2) layer used in a MOSFET is ________.
an insulator
a conductor
a semiconductor
None of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : FET Devices
5.
What is the range of gm for JFETs?
1 S to 10 S
100 S to 1000 S
1000 S to 5000 S
10000 S to 100000 S
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : FET Amplifiers
6.
What is the normalized gain expressed in dB for the cutoff frequencies?
–3 dB
+3 dB
–6 dB
–20 dB
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : BJT and FET Frequency Response
7.
In which of the following are operational amplifiers (op-amps) used?
Oscillators
Filters
Instrumentation circuits
All of the above
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(Not Answered)
Correct Answer: Option
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Learn more problems on : Operational Amplifiers
8.
Determine the output voltage when V1 = –V2 = –1 V.

0 V
–2 V
1 V
2 V
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Op-Amp Applications
9.
The voltage gain of a voltage buffer is ________ .
1
0
–1
–5
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Op-Amp Applications
10.
In an instrumentation amplifier, the output voltage is based on the ________ times a scale factor.
summation of the two inputs
product of the two inputs
difference between the two inputs
None of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Op-Amp Applications
11.
Calculate the effective resistance seen looking into the primary of a 20:1 transformer connected to an 8- load.
3.2 k
3.0 k
2.8 k
1.8 k
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Power Amplifiers
12.
A heat sink provides ________ thermal resistance between case and air.
a high
a low
the same
None of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Power Amplifiers
13.
In the Wien bridge oscillator with R1 = R2 = R and C1 = C2 = C, a ratio of R3 to R4 will provide sufficient loop gain for the circuit to oscillate.

0
0.5
1
2
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Oscillator Circuits
14.
The ________ are the terminals of an SCS.
anode, anode gate, cathode gate, and cathode
anode, cathode, cathode gate, and gate
anode, anode gate, cathode, and gate
anode, cathode, and gate
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : PNPN
15.
The anode gate connection can be used to turn the SCS device ________.
on
off
neither on nor off
either on or off
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : PNPN
16.
You have an unknown type of diode in a circuit. You measure the voltage across it and find it to be 0.3 V. The diode might be
a silicon diode.
a germanium diode.
a forward-biased silicon diode.
a reverse-biased germanium diode.
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Semiconductors
17.
What is the dc input resistance at the base of a BJT?
DCRC
DC·()
DC·re′
DCRE
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Transistor Bias Circuits
18.
An OTA has
a bias-current input terminal.
high output impedance.
no fixed open-loop voltage gain.
all of the above
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Special-Purpose Op-Amp Circuits
19.
An active filter uses capacitors and inductors in the feedback network.
True
False
Your Answer: Option
(Not Answered)
Correct Answer: Option
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Learn more problems on : Active Filters
20.
Amplitude modulation is a ________ process.
multiplication
division
sum/difference
Your Answer: Option
(Not Answered)
Correct Answer: Option
Discuss about this problem : Discuss in Forum
Learn more problems on : Communications
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