GATE 2021: Toppers Quiz-18 (App update required to attempt this test)
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Question 1
A 8192 bit dynamic RAM is designed in such as way that, it’s number of rows is 8 times to its number of columns. Then the number of words in this memory (in Decimal) is ………….
Question 2
Consider the system shown below:
D is a delay block of 1 unit. What is the impulse response of the cascaded system?
Question 3
Find the transfer function for the block diagram shown in the figure below
Question 4
In the circuit shown in the figure below, find the power (maximum) absorbed by the load resistor RL is ______ (in watts).
Question 5
The I/P – O/P voltage for the standard TTL family are given by = 2.6 V = 0.6V = 2V and = 0.4 V. The maximum- amplitude noise that can be tolerated when a low O/P is driving an input is
Question 6
An ideal n–channel MOSFET has the following parameters : mobility of electrons = 500 cm2 /V–sec, threshold voltage VTN = 0.6V and oxide thickness tox = 200Å. The MOSFET is biased in the saturation region at VGS = 5 V to get the saturation drain current (ID (sat)) of 6 mA, the required aspect ratio is _______________.
(Assume that the permittivity of oxide layer is 34.5 × 10–14 F/ cm)
Question 7
Let the number of Address lines and data Lines needed be X and Y for the implementation of 2*1 MUX using ROM .Then X+Y =______
Question 8
The open loop transfer function of the system is G(s) H(s) = . The root locus will intersect jaxis at A, the asymptotic line intersect jat point B The values are
Question 9
Let cn denotes the exponential Fourier series coefficients of a signal x(t) defined as
x(t) = t2, –π < t < π
x(t + 2π) = x(t)
Match List-I (Fourier series coefficient) with List II(Value of coefficient) and choose the correct answer using the codes given below.
Question 10
In the circuit shown in figure below, switch S is closed at t = Find the rate of change of current through inductor with respect to time at t = 0+. [in KA/sec]
Question 11
A homogenous dielectric fills region while region is perfect conductor as shown in the figure If the surface charge on the conductor is 5nC/m2, then electric field intensity is
Question 12
An enhancement type NMOS transistor is connected as a load device in the circuit with another MOSFET as shown in figure below:
The supply voltage VDD is fixed at 5 V and input voltage Vin is varied from 0 to 5 V. If both the transistors have negligible effect of channel length modulation and VT = 1 V, then which one of the following figure represents the transfer characteristics of circuit in a better way?
Question 13
A control system is shown in the following fig. For kv = 10, the percentage of peak over shoot is ( in %)
Question 14
A uniform plane wave in air is normally incident onto a lossless dielectric plate of thickness , and of intrinsic impedance . The SWR in front of the
Question 15
The Laplace transform of e4t cos(3t) is:
Question 16
In the circuit shown below, N is a two-port network. If I = 1 A, then the values of V1 and V2 will be
Take the Y-parameter of two port network N, as
Question 17
If is given that the solution of the differential equation passes through origin. The value of y(2) will be_____
Question 18
Consider a silicon PN junction at T = 300 k with acceptor concentration of Na = 1018 cm–3 and donor concentration of Nd = 1015 cm–3. If we change the acceptor doping concentration to Na = 1016 cm–3 by keeping all other parameters constant, then the percentage decrease in built – in potential of the junction will be equal to ________ %.
(Assume ni = 1.5 × 1010 cm–3, kT = 0.026 eV)
Question 19
The amplifier circuit shown in the figure is implemented using a compensated operational amplifier (op-amp), and has an open-loop voltage gain, and an open-loop cut-off frequency, fc= 8 Hz. The voltage gain of the amplifier at 15kHz, in V/V, is ______.
Question 20
Five telemetry signals, each of bandwidth 240 Hz are to the transmitted simultaneously by binary 8 bit PCM. The signals must be sample at least 20% above the Nyquist rate. Framing and synchronization requires an additional 0.5% of extra bits. The bit rate (in kbps) of the multiplexed signal is…………..