GATE PH Electronics PYQs & Answers

Questions 1–10 of 40. Imported answers require independent review unless marked reviewed.

The symbols C, D,

and

shown in the figure denote capacitor, ideal diode, input voltage and output voltage, respectively.

Which one of the following output waveforms (

) is correct for the given input waveform (

Your answerChoose one option.

waveform shown in figure

Diagram for Physics question 18 (figure 2)

waveform shown in figure

Diagram for Physics question 18 (figure 3)

waveform shown in figure

Diagram for Physics question 18 (figure 4)

waveform shown in figure

Diagram for Physics question 18 (figure 5)

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Consider the following circuit:

Suppose the input signal

Diagram for Physics question 24 (figure 2)

and the input signal

Diagram for Physics question 24 (figure 3)

Which one of the following output signals is correct?

Your answerChoose one option.

Diagram for Physics question 24 (figure 4)

Diagram for Physics question 24 (figure 5)

Diagram for Physics question 24 (figure 6)

Diagram for Physics question 24 (figure 7)

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The minimum number of basic logic gates required to realize the Boolean expression

is ____ (in integer).

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An extrinsic semiconductor shown in figure carries a current of 2 mA along its length parallel to +x axis.

When the majority charge carrier concentration is

and the sample is exposed to a constant magnetic field applied along the +z direction, a Hall voltage of 20 mV is measured with the negative polarity at

plane. Take the electric charge as

C. The concentration of minority charge carrier is negligible. Which of the following statement is/are true?

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

The majority charge carrier is electron

The magnitude of the applied magnetic field is 1 Tesla

The electric field corresponding to the Hall voltage is in the +y direction

The magnitude of Hall coefficient is

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A typical biasing of a silicon transistor is shown in figure.

The value of common-emitter current gain

for the transistor is 100. Ignore reverse saturation current. The output voltage

(in V) is ______ (in integer).

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Consider the operational amplifier circuit shown in figure.

The output voltage

is ______ V (in integer).

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Choose the most appropriate matching of the items in Column 1 with those in Column 2.

Column 1	Column 2
(i) PIN diode	P. Voltage regulation
(ii) Tunnel diode	Q. Radio frequency and microwave devices
(iii) Zener diode	R. Optoelectronic detection
(iv) Photo diode	S. Oscillator

Your answerChoose one option.

(i) - Q; (ii) - S; (iii) - P; (iv) - R

(i) - R; (ii) - Q; (iii) - P; (iv) - S

(i) - R; (ii) - S; (iii) - P; (iv) - Q

(i) - P; (ii) - Q; (iii) - R; (iv) - S

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Which one of the following options is CORRECT for the given logic circuit?

Your answerChoose one option.

P = 1, Q = 1; X = 0

P = 1, Q = 0; X = 1

P = 0, Q = 1; X = 0

P = 0, Q = 0; X = 1

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For a transistor amplifier, the frequency response is such that the mid band voltage gain is 200. The cutoff frequencies are 20 Hz and 20 kHz. What is the ratio (rounded off to two decimal places) of the voltage gain at 10 Hz to that at 100 kHz?

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An input voltage in the form of a square wave of frequency 1 kHz is given to a circuit, which results in the output shown schematically below. Which one of the following options is the CORRECT representation of the circuit?