GATE 2020:Topper's Quiz-18 (App update required to attempt this test)
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Question 1
The amplifier in which the effect of base width modulation is negligible is
Question 2
The input impedance of a short-circuited lossless transmission line quarter wave long is
Question 3
Which one of the following relations holds true for an irrotational field ?
Question 4
if the initial state of the counter (Q0Q1) shown below is (00) then the modulus of the counter will be ______
Question 5
The figure shown the internal schematic of a TTL AND-OR-Invert (AOI) gate. For the inputs shown in-the-figure, the output Y is
Question 6
If the efficiency of a photodiode (photo detector ) is 100% for the incident light with 50wave length. Then the responsivity of photo detector in [A/W] is______
Question 7
Open collector output of two 2 input NAND gates are connected, then find output?
Question 8
If the transfer function of a system is given by , then find the output of the system for step input.
Question 9
For the ideal circuit indicate current transfer characteristics assuming ideal diodes.
Question 10
Let are off wavelength of andmodes of an air filled rectangular wave guide with dimension 2.5 .The relation among the wavelengths is given by
Question 11
The current in an enhancement mode NMOS transistor biased in saturation mode was measured to be 1 mA at a drain-source voltage of 5 V. When the drain-source voltage was increased to 6V while keeping gate-source voltage same, the drain current increased to 1.02 mA. Assume that drain to source saturation voltage is much smaller than the applied drain-source voltage. The channel length modulation parameter λ (in V–1) is ____.
Question 12
The transfer function of a unity feedback system is If input to the system is unit step, the approximate settling time(in sec) for 2% criterion is
Question 13
A silicon bar is doped with 1015 donor atoms per cm3 at room temperature (T = 300k) and the minority carrier life time is = 10–6 sec.
A full adder circuit is designed using 2 input NAND gates only. If propagation delay of one NAND gate is 50 nsec. Then maximum number of additions per second are
Question 15
Consider the following statements regarding the circuit given in the figure, where the output voltage is constant.
1) Vin > the voltage at which the Zener breaks down
2) IL < the difference between I and IZ, the current at which the zener breaks down.
3) RS < the Zener nominal resistance. Which of the above statements are correct?
Question 16
The sequential circuit takes an input stream of 0’s & 1’s & produces an output stream of 0’s & 1’s. Initially it replicates the input on its output until two consecutive 0’s are encountered on the input. From then onwards it produces an output stream which is the bitwise complement of input stream until it encounters two consecutive 1’s whereupon process repeats.
An example of input & output stream is given
input 1 0 11 00 010011 011
output 1 0 11 00 101100 011
The minimum number of J-K flip flop required to design above sequential circuit is ……
Question 17
Calculate the minimum non-zero base of number system which satisfies the quadratic equation x2 – 31x + 233 = 0
Whose roots are 13 and 17.
Question 18
For the circuit shown, Norton’s equivalent circuit will be
Question 19
For a parallel polarization the reflection coefficient is given as,
Question 20
In figure, the Boolean expression for the output in terms of inputs A, B and C when the clock ‘CLK’ is high, is