GATE ECE format:msq PYQs & Answers

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Attempt a question, record the concept and assumptions, then check the available answer. Rework mistakes after revising the relevant concepts. Topic tags can overlap; review the question context.

Questions 1–10 of 50. Imported answers require independent review unless marked reviewed.

Topic practice 50 questionsPage 1 of 5

Consider a p-n junction diode when it is forward biased with 2 V.

Which of the following is/are the correct magnitude(s) of the energy difference between quasi Fermi-levels,

in the n-side and

in the p-side?

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

2 eV

1 eV

2 V

1 V

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Consider the matrix

. Which of the following options is/are TRUE if

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

and

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A binary ripple counter is designed to count

. Which of the following is/are the number of flip-flops required to design the counter?

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

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Which option(s) represents/ represent the dielectric loss tangent of a substrate?

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

Ratio of the real to imaginary parts of the total displacement current

Ratio of the electric susceptibility to permittivity

Ratio of the polarization vector

to the displacement vector

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Figure shows the output characteristics of two different Bipolar Junction Transistors (BJT), BJT 1 with magnitude of Early voltage

, and BJT 2 with magnitude of Early voltage

. Which of the following options is/are correct regarding the Early voltages?

Diagram for Electronics and Communication Engineering question 29

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

is infinitely large

is finite

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Consider an LED based on a direct bandgap semiconductor material with energy bandgap 1.3 eV.

Given: Planck’s constant,

J s and speed of light in free space is

m s

In which of the following wavelength ranges the LED will NOT emit?

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

1410 ± 20 nm

1090 ± 20 nm

950 ± 20 nm

510 ± 20 nm

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Let the relevant bandwidth (B) of a digital communication system be 1 MHz and kT = −174 dBm/Hz, where k is Boltzmann’s constant and T is equivalent noise temperature of the receiver. The power (S) of signal received through an additive Gaussian channel is −80 dBm.

Which of the following options is/are TRUE about Shannon capacity (C) of the channel?

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

C = B

C = 2B

C > 3B

C < B

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Consider the four-variable Boolean function,

with ‘

’ as MSB and ‘

’ as LSB. Which of the following expressions is/are the valid form(s) of

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

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Consider a real, narrowband signal

where the maximum frequency components of

and

are

and

, respectively. Which of the following statements is/are correct for

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

represents a PSK modulated signal for suitable choices of

and

represents an amplitude modulated signal for suitable choices of

and

represents a band-limited Gaussian noise process.

never represents a narrowband FM signal.

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Let

and

represent two sinusoids for a positive integer

and

. Which of the following statements about

and

is/are valid?

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

and

are orthogonal to each other over

and

are orthonormal to each other over

is a harmonic of

and

are non-orthogonal to each other over

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GATE ECE format:msq PYQs

How to practice format:msq

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