GATE PH Semiconductors in Equilibrium PYQs & Answers

Questions 1–7 of 7. Imported answers require independent review unless marked reviewed.

In the circuit shown,

Volts, where

is in seconds, which of the following options is correct? (take the op amp to be ideal)

Your answerChoose one option.

is square wave with peak-to-peak voltage = 30 V and time period is 1 ms.

is a sine wave with peak-to-peak voltage = 4 V and time period is 1 ms.

is sine wave with peak-to-peak voltage = 30 V and time period is 1 ms.

is square wave with peak-to-peak voltage = 4 V and time period is 1 ms.

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Considering the circuit and the associated signals measured at different pins (numbered as 1, 2, 3, 4, 5) shown in the figure, the correct option is

Your answerChoose one option.

NOT gate between pins 1 and 2 is faulty.

NOR gate is faulty.

NOT gate between pins 4 and 5 is faulty.

The NOR and output NOT gates, are both faulty.

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The output signal (current

) of a reverse biased (with a voltage

) photodiode, on which light is incident, is fed to an amplifier (see figure). The output voltage is digitized by a 10 bit Analog to Digital converter (ADC) which has a reference voltage of 5 V. The smallest current

which can be measured by the circuit in nano-Amperes (rounded off to one decimal place) is _____.

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A logic gate circuit is shown in the figure below. The correct combination for the input

for which the output

Your answerChoose one option.

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particle is scattered from an Au target at rest as shown in the figure.

and

are the detectors to detect the scattered

particle at an angle

and along the beam direction, respectively, as shown. The signals from

and

are converted to logic signals and fed to logic gates. When a particle is detected, the signal is 1 and is 0 otherwise. Which one of the following circuits detects the particle scattered at the angle

only?

Your answerChoose one option.

Diagram for Physics question 41 (figure 2)

Diagram for Physics question 41 (figure 3)

Diagram for Physics question 41 (figure 4)

Diagram for Physics question 41 (figure 5)

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In the transistor circuit shown in the figure,

and

. The value of the base current in

(rounded off to one decimal place) is ________

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The figure shows an opamp circuit with a 5.1 V Zener diode in the feedback loop. The opamp runs from

V supplies. If a +1 V signal is applied at the input, the output voltage (rounded off to one decimal place) is _____.

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GATE PH Semiconductors in Equilibrium PYQs

How to practice Semiconductors in Equilibrium

Question 43

Question 44

Question 60

Question 19

Question 41

Question 60

Question 65