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GATE EC: 2018 Mini Mock 11
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Question 1
The critical value of gain for the system is 80. The system is operating at a gain of 40. The G.M. (dB) of the system is______?
Question 2
find the incremental resistance in the circuit given below considering each diode n=3, Vη = 0.8 V, dc forward resistance of diode is Rf = 0 Ω. Assuming initially when s is open V0 = 2.4 V?
Question 3
Consider the circuit given below
Initially D flip flop was cleared. S0, S1 are select inputs and I is input data.
Which of the following statement is incorrect?
Initially D flip flop was cleared. S0, S1 are select inputs and I is input data.
Which of the following statement is incorrect?
Question 4
The following five facts are given about a discrete time signal 
with z-transform 
.
1)
is a real right sided signal
2)
has exactly two poles
3)
has two zeros at the origin
4)
has a pole at 
5)
Then,
?
with z-transform . 1)
is a real right sided signal 2)
has exactly two poles 3)
has two zeros at the origin 4)
has a pole at 5)
Then,
?Question 5
If an ideal transformer has an inductive load element at port 2 as shown in the figure below, the equivalent inductance at port 1 is
Question 6
A half wave rectifier diode circuit have following parameters:
R = 10Ω, L=2m H, C = 10 µF. VS=230V
The circuit is initially relaxed, With switch closed at t=0, determine conduction time of diode ------------ (fill in the blanks)
R = 10Ω, L=2m H, C = 10 µF. VS=230V
The circuit is initially relaxed, With switch closed at t=0, determine conduction time of diode ------------ (fill in the blanks)
Question 7
A signal is modulated using the sinusoidal Pulse Width Modulation. The pulse width of the modulated signal corresponding to zero amplitude is selected as 2 µs. The width varies with the amplitude of the signal such that: at +1 V, width = 4 µs, and at -1 V, width = 0 µs. Determine the pulse width, when the amplitude is – 0.6 V
Question 8
In an experiment with 15 observations on x, the following results we available
One observation that was 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is ________.
One observation that was 20 was found to be wrong and was replaced by the correct value 30. Then the corrected variance is ________.
Question 9
Parcels from sender S to receiver R pass sequentially through two post-offices. Each post-office has a probability 
of losing an incoming parcel, independently of all other parcels. Given that a parcel is lost, the probability that it was lost by the second post-office is_________.
of losing an incoming parcel, independently of all other parcels. Given that a parcel is lost, the probability that it was lost by the second post-office is_________. Question 10
In the circuit shown in the figure, the angular frequency w (in rad/s), at which the Norton equivalent impedance as seen from terminals b-b' is purely resistive, is
__________________.
__________________.
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ESE & GATE ECGeneralNov 23ESE & GATE EC
