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.A narrow band amplifier is one that is bandwidth
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Question 2 of 30
Q-2.Atypical RC coupling Capacitor for a transistor amplifier is
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Question 3 of 30
Q-3.Electronics Branch started with the invention of
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Question 4 of 30
Q-4.A silicon sample is uniformly doped with 1016 phosphorus atoms/cm3 and 2 × 1016 boron atoms/cm3 . If all the dopants are fully ionized, the material is:
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Question 5 of 30
Q-5.The voltage gain of an amplifier decreases 20 dB per decade above 20 kHz. If the midband voltage gain is 86 dB, what is the ordinary voltage gain at 20 MHz?
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Question 6 of 30
Q-6.The threshold voltage of an n-channel enhancement mode MOSFET is 0.5 V. When the device is biased at a gate voltage of 3 V. Pinch-off would occur at a drain voltage of:
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Question 7 of 30
Q-7.A thyristor, when triggered, will change from forward-blocking state to conduction state if its anode to cathode voltage is equal to:
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Question 8 of 30
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Question 9 of 30
Q-9.In a feedback amplifier, sensitivity D is equal to:
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Question 10 of 30
Q-10.In a p -type semiconductor, the conductivity due to holes (σp ) is equal to (e is the charge of hole, µp is the hole mobility, p 0 is the hole concentration):1.p 0.e /µp 2.µp /p 0.e 3.p 0.e .µp 4.None of the above.
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Question 11 of 30
Q-11.The beta of transistor maybe determined directly from the curve plotted between
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Question 12 of 30
Q-12.A triode is used as an amplifier because
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Question 13 of 30
Q-13.A vacuum diode can be used as
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Question 14 of 30
Q-14.An amplifier of passband 450khz to 460 khz will be named as
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Question 15 of 30
Q-15.An op amp with a rail-to-rail output
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Question 16 of 30
Q-16.For faithful amplification with Germanium transistor, the base emitter junction voltage VBE should not fall below
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Question 17 of 30
Q-17.With voltage-divider bias, the base voltage is
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Question 18 of 30
Q-18.The critical grid voltage of a thyrotron is defined as the negative grid voltage, for a given plate potential at which ionization of the gas starts
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Question 19 of 30
Q-19.The current gain of a transistor is defined as the ratio of the collector current to the
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Question 20 of 30
Q-20.The input signal for an instrumentation amplifier usually comes from
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Question 21 of 30
Q-21.If a CE stage is direct coupled to an emitter follower, how many coupling capacitors are there between the two stages?
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Question 22 of 30
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Question 23 of 30
Q-23.Lissajous figure at a 45 degree angle means:
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Question 24 of 30
Q-24.Bandwidth of an ideal op-amp is:
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Question 25 of 30
Q-25.Semi-logarithmic paper means
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Question 26 of 30
Q-26.The output waveform of a 555 timer is
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Question 27 of 30
Q-27.The emitter is at ac ground in a
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Question 28 of 30
Q-28.While checking a capacitor with a multi-meter,if the pointer deflects and remain there that means?
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Question 29 of 30
Q-29.The unity-gain frequency equals the product of closed-loop voltage gain and the
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Question 30 of 30
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