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.The voltage gain equals the output voltage divided by the
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Question 2 of 30
Q-2.In a standard regulator circuit that uses Zener diode 10 V, the input voltage varies from 25 to 40 V, load current varies from 10 to 20 mA, and the minimum Zener current is 5 mA, the value of the series resistance in ohms will be:
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Question 3 of 30
Q-3.At the lower or upper cutoff frequency, the voltage gain is
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Question 4 of 30
Q-4.An astable 555 timer has the following number of stable states:
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Question 5 of 30
Q-5.When the reverse voltage increases from 5 to 10 V, the depletion layer
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Question 6 of 30
Q-6.A coupling circuit is a
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Question 7 of 30
Q-7.Consider the following statements: pure germanium and pure silicon are examples of:
1. Direct band-gap semiconductors
2. Indirect band-gap semiconductors
3. Degenerate semiconductors Of these statements:
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Question 8 of 30
Q-8.In a transistor hfe = 50, hie = 830 ohms, hoe = 10–4 mho. When used as in the CB mode, then its output resistance will be:
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Question 9 of 30
Q-9.Fabricated layers of SCR are
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Question 10 of 30
Q-10.Turn-on time of an SCR can be reduced by using a:
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Question 11 of 30
Q-11.If a load resistance is 1 kΩ, a stiff current source has a resistance of
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Question 12 of 30
Q-12.If GBW is limited, the Q of the stage will
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Question 13 of 30
Q-13.The operating point of an NPN transistor amplifier should not be selected near the saturated region as it may
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Question 14 of 30
Q-14.The pulse width out of a one-shot multivibrator increases when the
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Question 15 of 30
Q-15.When a junction transistor is operated under saturated conditions:
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Question 16 of 30
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Question 17 of 30
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Question 18 of 30
Q-18.Gold is often diffused into silicon p–n junction devices to:
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Question 19 of 30
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Question 20 of 30
Q-20.The center frequency of a bandpass filter is always equal to
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Question 21 of 30
Q-21.The transresistance of an amplifier is the ratio of its
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Question 22 of 30
Q-22.The voltage across the zener resistance is usually
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Question 23 of 30
Q-23.Which of these is the best description of a zener diode?
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Question 24 of 30
Q-24.In an nPn transistor with normal bias
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Question 25 of 30
Q-25.If the base supply voltage increases, the Q point moves
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Question 26 of 30
Q-26.An ICIS amplifier is saturated. A possible trouble is
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Question 27 of 30
Q-27.Larger the value of the capacitor filter:
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Question 28 of 30
Q-28.A CS amplifier has a voltage gain of
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Question 29 of 30
Q-29.The minimum anode current that keeps a thyristor turned on is called the
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Question 30 of 30
Q-30.The initial slope of a sine wave increases when
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