Electronics Devices and Circuits Online Test 1 – Randomized MCQs

With each visit of this Electronics Devices and Circuits online Quiz / Practice Test, the list of MCQs / Objective Questions presented will be different, offering you a diverse set of practice opportunities. This variability encourages you to practice extensively, refining the accuracy of your answers and your overall grasp of the content. By utilizing this resource, you can hone your skills and become more adept at managing time constraints during actual exams.

Test Instructions
Question type	Randomized MCQs.Changes every time you visit the test
Total Number of Questions	30
Time Limit	20 Minutes
Points	1 Point for each Question

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Question 1 of 30

Q-1.If you want to improve the high-frequency response of an amplifier, which of these would you try?

Decrease the coupling capacitances

Increase the emitter bypass capacitance.

Shorten leads as much as possible.

Increase the generator resistance

Your Answer:Correct

Your Answer:Incorrect

Question 2 of 30

Q-2.The VGS(on) of an n-channel E-MOSFET is

Less than the threshold voltage

Equal to the gate-source cutoff voltage

Greater than VDS(on)

Greater than VGS(th)

Your Answer:Correct

Your Answer:Incorrect

Question 3 of 30

Q-3.OPAMP is a/an:

Differential amplifier

Oscillator

Rectifier

None of the above

Your Answer:Correct

Your Answer:Incorrect

Question 4 of 30

Q-4.a FET is a

unipolar transistor

Bipolar transistor

Tripolar transistor

None of these

Your Answer:Correct

Your Answer:Incorrect

Question 5 of 30

Q-5.Op-Amp uses:

Only +ve Voltage

Only –ve voltage

Dual supply, i.e., ± Vcc

None of the above

Your Answer:Correct

Your Answer:Incorrect

Question 6 of 30

Q-6.The anode cathode, voltage at which a gas filled diode fires is known as

Ionization voltage

Critical voltage

Deionization voltage

Normal voltage

Your Answer:Correct

Your Answer:Incorrect

Question 7 of 30

Q-7.The emitter diode is usually

Forward-biased

Reverse-biased

Nonconducting

Operating in the breakdown region

Your Answer:Correct

Your Answer:Incorrect

Question 8 of 30

Q-8.Absolute zero temperature equals

-273 degrees C

0 degrees C

25 degrees C

50 degrees C

Your Answer:Correct

Your Answer:Incorrect

Question 9 of 30

Q-9.Barkhusen criteria is:

Positive feedback, Aβ = 1, θ = 0 or multiple 360

Negative feedback, Aβ = 1, θ = 0 or multiple 360

Positive feedback, Aβ = 0, θ = 0 or multiple 360

Negative feedback, Aβ = 1, θ = 180

Your Answer:Correct

Your Answer:Incorrect

Question 10 of 30

Q-10.If f = 1 MHz, and f2 = 10 Hz, the ratio f/f2 represents how many decades?

Your Answer:Correct

Your Answer:Incorrect

Question 11 of 30

Q-11.In a diode circuit, the point where the diode starts conducting is known as:

Cut-in point

Cut-out point

Knee point

Cut-off point

Your Answer:Correct

Your Answer:Incorrect

Question 12 of 30

Q-12.The potential divider biasing is used in amplifiers to

Limit the input AC signal going to the base

Reduce DC base current

Reduce the cost of the circuit by limiting the number of resistors

Make the operating point almost independent of β

Your Answer:Correct

Your Answer:Incorrect

Question 13 of 30

Q-13.In a voltage-controlled current source,

A current booster is never used

The load is always floated

A stiff current source drives the load

The load current equals ISC

Your Answer:Correct

Your Answer:Incorrect

Question 14 of 30

Q-14.The most commonly used emitter in receiving tube is

Oxide coated

Thoriated tungsten

Tungsten

None of these

Your Answer:Correct

Your Answer:Incorrect

Question 15 of 30

Q-15.Negative feedback does not improve

Stability of voltage gain

Nonlinear distortion in later stages

Output offset voltage

Power bandwidth

Your Answer:Correct

Your Answer:Incorrect

Question 16 of 30

Q-16.in a vacuum triode

territory electrodes cold cathode anode and control grid

the control grid is kept near the cathode then anode

the control grid is always kept attractive potential with respect to cathode

all of these

Your Answer:Correct

Your Answer:Incorrect

Question 17 of 30

Q-17.The material used for construction of LED is

GaAsP

None of these

Your Answer:Correct

Your Answer:Incorrect

Question 18 of 30

Q-18.The gate controls

The width of the channel

The drain current

The proportional pinch-off voltage

All the above

Your Answer:Correct

Your Answer:Incorrect

Question 19 of 30

Q-19.Heat sinks are used with power transistors to

To increases the collector dissipation rating of the transistor

Increase the gain of the transistor

Increase the output power

Reduces the heat loses in the transistor

Your Answer:Correct

Your Answer:Incorrect

Question 20 of 30

Q-20.If the collector resistor is open, the ac input voltage will

Decrease

Increase

Remain the same

Equal approximately zero

Your Answer:Correct

Your Answer:Incorrect

Question 21 of 30

Q-21.An emitter follower has a voltage gain that is

Much less than one

Approximately equal to one

Greater than one

Zero

Your Answer:Correct

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Question 22 of 30

Q-22.Packaging is used for:

Protection

Safety

Both (a) and (b)

None of the above

Your Answer:Correct

Your Answer:Incorrect

Question 23 of 30

Q-23.The transition capacitance in step-graded junction varies as:

C_jαV_R³

C_jαV_R^–1/2

C_jαV_R–^1/3

None of the above

Your Answer:Correct

Your Answer:Incorrect

Question 24 of 30

Q-24.The current gain of a transistor is the ratio of the

Collector current to emitter current

Collector current to base current

Base current to collector current

Emitter current to collector current

Your Answer:Correct

Your Answer:Incorrect

Question 25 of 30

Q-25.At reverse bias, the number of minority Carriers crossing the junction of a diode depends primarily on the

Concentration of doping impurities

Rate of thermal generation of electron hole pair

Magnitude of the potential barrier

All of these

Your Answer:Correct

Your Answer:Incorrect

Question 26 of 30

Q-26.The biquadratic filter

Has low component sensitivity

Uses three or more op amps

Is also called Tow-Thomas filter

All of the above

Your Answer:Correct

Your Answer:Incorrect

Question 27 of 30

Q-27.Sallen-Key filters are also called

VCVS filters

MFB filters

Biquadratic filters

State-variable filters

Your Answer:Correct

Your Answer:Incorrect

Question 28 of 30

Q-28.The common-mode rejection ratio is

Very low

Often expressed in decibels

Equal to the voltage gain

Equal to the common-mode voltage gain

Your Answer:Correct

Your Answer:Incorrect

Question 29 of 30

Q-29.With an ICVS amplifier, the circuit approximates an ideal

Voltage amplifier

Current-to-voltage converter

Voltage-to-current converter

Current amplifier

Your Answer:Correct

Your Answer:Incorrect

Question 30 of 30

Q-30.One advantage of a class B push-pull amplifier is

Very small quiescent current drain

Maximum efficiency of 78.5 percent

Greater efficiency than class A

All of the above

Your Answer:Correct

Your Answer:Incorrect

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