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GATE 2021: Toppers Quiz-9 (App update required to attempt this test)
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Question 1
In the given circuit, the race around condition
Question 2
The transfer function of the lead compensator And, If the lead compensator need to provide a maximum phase lead of 40° at a frequency of 5 rad/s, then the value of T is around_____.
Question 3
Consider the following statements
A clamper circuit
1) Adds or subtracts a dc voltage to or from a waveform
2) Does not change the shape of the waveform
3) Amplifier the waveform of these statements
Which of the above statements are correct?
Question 4
An AM signal is given by s(t) = [8 + 4 cos(8000t) + 2 cos(4500t)] cos2πFct then modulation efficiency of the wave is _____ %.
Question 5
Consider an AWGN channel with 4kHz bandwidth and the two sided noise PSD 10-12W/Hz. The signal power required at receiver is 0.1mw calculate the channel capacity.
Question 6
For a particular semiconductor material, following parameters observed
μn = 1000 cm2/Vs
μp = 600 cm2/Vs
NC = NV = 1019 cm-3
These parameters are independent of temperature. The measured conductivity of the intrinsic material is σ = 10-6 Ω-1cm-1 at T = 300K
The resistivity at T = 500 K is
μn = 1000 cm2/Vs
μp = 600 cm2/Vs
NC = NV = 1019 cm-3
These parameters are independent of temperature. The measured conductivity of the intrinsic material is σ = 10-6 Ω-1cm-1 at T = 300K
The resistivity at T = 500 K is
Question 7
The plane wave with
A lossless medium (εr = 4, μr = 1) encounters free space at z = 0. The reflected electric field is
Question 8
The BJT’s in the Darlington follower of figure have β = 100. If the follower is fed with a source having a 100 kΩ resistance and is loaded with 1 kΩ, the input resistance is
Question 9
Consider a system shown in figure the value of K and Kn so that maximum overshoot in the unit step response, is 0.2 and the peak time is 1 second.
Question 10
A sample of Ge has n-type impurity concentration of 2 × 1014/cm3 and p type impurity concentration of 3 × 1014/cm3. Calculate n and P (in /cm3).
Question 11
If the given OP-Amp is ideal the resistance seen by load is given as:
Question 12
If the function W, X, Y and Z are as
Then
Question 13
Power spectral density of message in given by, Sm(ω) = P rect (ω/2α), α = 8000 π,
The noise has PSD; Sn(ω) = 10–8
If the minimum output SNR at receiver > 30 dB the minimum transmission bandwidth (in Hz) required is
Question 14
The open loop transfer function of a unity feedback system is
The value of ‘T’ to drive the system on to the verge of instability is
The value of ‘T’ to drive the system on to the verge of instability is
Question 15
For a parallel polarization the reflection coefficient is given as,
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ESE & GATE ECGeneralOct 12ESE & GATE EC