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GATE EC 2020: Revision test Quiz 6 (App update required to attempt this test)

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Question 1

The normalized radiation intensity of an antenna in spherical coordinates is given by
U = sinθ sinφ, 0≤ θ ≤ π , 0≤ φ ≤ π
 
The directivity of antenna is given by _______.

Question 2

The bit stream 110111001 is to be transmitted using DPSK. The reference bit is ‘1’. The transmitted phase sequence is

Question 3

Consider an air-filled rectangular waveguide with dimensions a = 2.286 cm and b = 1.016 cm. At 10 GHz operating frequency, the value of the propagation constant (per meter) of the corresponding propagating mode is _________.

Question 4

consider a unity feedback system whose open loop transfer function .

The value of K that results in phase margin of 45o_______

Question 5

A conductor with cross-sectional area of .carrier a conductor current 2. If and , the magnitude of the displacement current density is

Question 6

The response of the system to the unit step input the value of at t=0is

Question 7

In the circuit shown below, the power dissipated in 10-ohm resistors is _______ W.

Question 8

An RC filter is being used for a certain operation in a medium inflicted by white noise with N/2 as 2*10-6 W/Hz. Where R = 1 k and C = 1 μF. Determine the power(in μW) obtained due to noisy input at 500 Hz frequency at the output of this Filter

Question 9

The feedback used in the circuit shown below can be classified as
2019-11-10.png (1920×1080)

Question 10

Find the output expression of the combinational circuit given below i.e. Y(A,B)=_________. Where A is the MSB (Most Significant Bit).

Question 11

If V(t)= cos[wct + k ], and m(t) is having PDF of f(m)= , then determine the rms of frequency deviation value.

Question 12

In the circuit using an ideal opamp, the 3-dB cut-off frequency (in Hz) is __________.
Description: D:\GradeStack Courses\GATE Tests (Sent by Ravi)\GATE EC 10-Mar\GATE-ECE-2015-Paper-3_files\image038.png

Question 13

In the circuit shown, choose the correct timing diagram of the output (y) from the given waveforms W1, W2, W3 and W4

Question 14

What is the input impedance of a lossless transmission line operating at 1 GHz, with load and characteristic impedance of 10-j20 Ω and 50Ω respectively and the length of the transmission line being 0.25 λ.

Question 15

When a p-n junction is formed it gives rise to formation of a built-in voltage at the junction. If it is given that the difference in the energy level of the conduction band at the p and n side is 1.12 eV then the built-in potential is ________ V. Given NA = 1016 cm-3, ni = 1.6 x 1015 cm-3, ϵ0 = 8.85 x 10-12 F/m, q = 1.6 x 10-19 C}
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Jul 20ESE & GATE EC