GATE 2020:Topper's Quiz-19 (App update required to attempt this test) for ESE & GATE EC Exams

Question 1

A BJT has β = 50, base collector leakage current

= 3.3μA. If transistor is connected in common emitter configuration. Then what will be the leakage current I_CO if base current is 0.

Question 2

For a gain constant k, the phase-lead compensator

Question 3

For an Elliptically polarized wave incident on the interface of a dielectric at the Brewster angle, the reflected wave will be

Question 4

A MUX network is shown in the given figure

The value of

is :-

Question 5

A 10V reference is used in the circuit.

Zener diode of 400nw & 5V with fining current 10mA is used. To satisfies circuit condition shown in figure the value of Rs is __________.

Question 6

In a lightly depend p–type semiconductor, the corresponding acceptor dopping concentration to get minimum conducting is ____

10¹⁰ cm^–3.

(Assume intrinsic carries concentration is n_i = 2.5 x 10¹⁰/cm³ & _p = 0.4 _n)

Question 7

The 7’s complement of octal number is 5264. Then find the hexadecimal equivalent of octal number

Question 8

In the ac equivalent circuit shown in the figure, if i_in is the input current and R_F is very large, the type of feedback is

Question 9

During transmitting over a binary communication channel, bit error occurs independently with a probability of p. The probability of at most 2 bits in error in a block of ‘n’ transmitted bits would be

Question 10

A feedback amplifier comprised of two blocks connected in cascade having gain of 100 each. A feedback block is connected in such a way that overall gain becomes Now the gain of each block is reduced to 50% maintaining same feedback block. Then overall new gain will be ……. (current upto two decimal places)

Question 11

A system has poles at 0.01 Hz, 1 Hz and 80 Hz; zeros at 5 Hz, 100 Hz and 200 Hz. The approximate phase of the system response at 20 Hz is

Question 12

And

For the given state space model, linear system, this system will be uncontrollable and unobservable when

Question 13

The incoming solar radiation at a place on the surface of the earth is 2 kW/m². The amplitude of the electric field corresponding to this incident power is nearly equal to

Question 14

A material is described by the following electrical parameters at a frequency of 10GHz,

mho/m ,

and

. The material at this frequency is considered to be

Question 15

The FOM of a logic family is given by:

Question 16

Resonant frequency of a Tuned RF receiver is at 2 MHz and its bandwidth is 10 kHz. However due to some anomalies in the circuit, its actual bandwidth is found to be 8 kHz. What is the error while the Q-factor of the circuit is being calculated?

Question 17

If op-amp in the below circuit is ideal, then find the hysteresis width (in V) of the non-inverting Schmitt trigger that shown below

Question 18

A series resonant circuit has

Then the resonant frequency is

Question 19

111100,11100,1100 are represented in corresponding signed 2's complement then find its decimal equivalent.

Question 20

Number of essential prime implicants be X, prime implicants be Y, and implicants be Z for the minimised function

, then the product of XYZ is _________.