GATE PH Electronics PYQs & Answers — Page 2

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Questions 11–20 of 40. Imported answers require independent review unless marked reviewed.

Topic practice 40 questionsPage 2 of 4

For the Op-Amp circuit shown below, choose the correct output waveform corresponding to the input

(in Volts). The saturation voltage for the circuit is

Your answerChoose one option.

Diagram for Physics question 11 (figure 2)

Diagram for Physics question 11 (figure 3)

Diagram for Physics question 11 (figure 4)

Diagram for Physics question 11 (figure 5)

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For an Op-Amp based negative feedback, non-inverting amplifier, which of the following statements are true?

Your answerSelect all correct options. You can choose more than one.

Closed loop gain < Open loop gain

Closed loop bandwidth < Open loop bandwidth

Closed loop input impedance > Open loop input impedance

Closed loop output impedance < Open loop output impedance

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For a bipolar junction transistor, which of the following statements are true?

Your answerSelect all correct options. You can choose more than one.

Doping concentration of emitter region is more than that in collector and base region

Only electrons participate in current conduction

The current gain

depends on temperature

Collector current is less than the emitter current

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A power supply has internal resistance

and open load voltage

. When a load resistance

is connected to the power supply, a voltage drop of

is measured across the load. The value of

is ________ (Round off to the nearest integer)

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A junction is formed between a metal on the left and an

-type semiconductor on the right. Before forming the junction, the Fermi level

of the metal lies below that of the semiconductor. Then which of the following schematics are correct for the bands and the

characteristics of the junction?

Your answerSelect all correct options. You can choose more than one.

Diagram for Physics question 57 (figure 2)

Diagram for Physics question 57 (figure 3)

Diagram for Physics question 57 (figure 4)

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The minimum number of two-input NAND gates required to implement the following Boolean expression is ____________

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As shown in the figure, two metal-semiconductor junctions are formed between an n-type semiconductor

and metal

. The work functions of

and

are

and

, respectively with

The

characteristics (on linear scale) of the junctions is best represented by

Your answerChoose one option.

Diagram for Physics question 4 (figure 2)

Diagram for Physics question 4 (figure 3)

Diagram for Physics question 4 (figure 4)

Diagram for Physics question 4 (figure 5)

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The donor concentration in a sample of n-type silicon is increased by a factor of 100. Assuming the sample to be non-degenerate, the shift in the Fermi level (in meV) at 300 K (rounded off to the nearest integer) is _____. (Given:

meV at 300 K)

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The above combination of logic gates represents the operation

Your answerChoose one option.

NAND

AND

NOR

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In a semiconductor, the ratio of the effective mass of hole to electron is 2:11 and the ratio of average relaxation time for hole to electron is 1:2. The ratio of the mobility of the hole to electron is

Your answerChoose one option.

4:9

4:11

9:4

11:4

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GATE PH Electronics PYQs

Question 11

Question 20

Question 28

Question 30

Question 57

Question 59

Question 4

Question 17

Question 26

Question 27