GATE EC: 2018 Mini Mock 5 for ESE & GATE EC Exams

Question 1

In cellular networks, on similar channels, simultaneous users will result on:
i. Digital Technology
ii. Reuse of frequency
iii. CDMA and TDMA
iv. VLRs and HLR

Question 2

Consider a multiplexer with X and Y as data inputs and Z as control input. Z = 0 selects input X and Z = 1 selects input Y. What are the connections required to realize the 2- variable Boolean function $Description: F:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE-ME-20-April\GATE-IES-EC-Digital=Electronics-Circuits_files\image327.png$ , without using any additional hardware?

Question 3

What will be the minimum frequency response, for which a signal x(t) could be reconstructed from the given sample x(t), when x(t) = 2 cos (100πt) + 5 sin (250 πt + π/3) - 4.5 cos (375 πt - π /4) + 15.9 sin (600 π t + π/9)

Question 4

What will be the maximum value of magnetic field, if an electromagnetic wave propagates in x direction with wavelength 15.0 mm having an electric field in y direction with magnitude of 80 V/m

Question 5

On an A-4 size sheet, a colour scanner scans a picture with dimensions: height 11 inches and width 8.5 inches. If the resolution of colour scanner is 600 dots/inch with picture quantization of 256 levels/color, then find the time required to transmit a picture with 256 kbps modem speed?

Question 6

Consider the following statements:
For the first order transient systems, the time constant is
1) a specification of transient response
2) reciprocal of real-axis pole location
3) an indication of accuracy of response
4) an indication of speed of the response
Which of the statements given above are correct?

Question 7

Match List-i (Load Impedance) with List-ii (Value of Reflection Coefficient) and select the correct answer using the code given below the Lists:

List-i List-ii
A. Short Circuit 1. 0

B. Open Circuit 2. 1

C. Line characteristic impedance 3. -1

D. 2 x line characteristic impedance 4. 1/3

Question 8

The PMOSFET circuit shown in the figure has

. If I_DS = -0.1mA and V_DS = -2.4V then the width of channel W and R are respectively:

Question 9

Consider the following statements:
For a square waveguide of cross-section 3cm × 3 cm it has been found.
1). At 6 GHz dominant mode will propagate.
2). At 4 GHz all the modes are evanescent.
3). At 11 GHz only dominant modes and no higher order mode will propagate.
4). At 7 GHz degenerate modes will propagate.
Which of the above statements are correct?

Question 10

The driving point impedance of the network shown in the figure has a zero at -4 and poles at

then find the values of R, L and C are respectively