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BARC Full Syllabus Test 14

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Question 1

The amplifier shown in Fig. has input resistance of 1500

and drives a load of 100

. If the input current is 0.632 mA r.m.s. and load voltage is 30 V r.m.s, then power gain in dB is

Question 2

What will be the equation of simplification of the given K-Map ?

Question 3

Identify the mod value of the given ripple counter

Question 4

and

Find y(n) = x (n) ⨂ h(n), where ⨂ denotes circular convolution.

Question 5

For the operating point Q in Fig., what should be the value of $Description: E:\Gate\SSC JE Electrical New Files\35_Transistor-Biasing_files\image068.png$ ? Assume $Description: E:\Gate\SSC JE Electrical New Files\35_Transistor-Biasing_files\image165.png$ and $Description: E:\Gate\SSC JE Electrical New Files\35_Transistor-Biasing_files\image149.png$
$Description: E:\Gate\SSC JE Electrical New Files\35_Transistor-Biasing_files\image156.png$

Question 6

Consider the signal given below,

then the z-transform X(z) is

Question 7

A circuit having power factor of 0.8 consumes 40 W. What will be the value of reactive power (in VAR) of the circuit?

Question 8

For a single-phase full wave rectifier having a turn ratio 10: 1. If the input at the primary of the transformer is connected to 220 V, 50 Hz A.C supply. What will be average output voltage of full wave rectifier?

Question 9

The 3-bit ripple counter (shown below) is to be designed as a MOD 4 counter

What is the best architecture of the ‘Logic gate’?

Question 10

What is the percentage voltage error of a potential transformer with system voltage of 11,000 V and having turns ratio of 100, if the measured secondary side voltage is 105 V?

Question 11

An amplifier has a current gain of 240 and an input impedance of

without feedback. If negative current feedback

is applied, the input impedance of the amplifier will become

Question 12

In a AM signal the received signal power is 10^–10 W with a maximum modulating signal of 5 kHz. The noise spectral density at the receiver input is 10 ^–18 W/Hz. If the noise power is restricted to the message signal bandwidth only, this signal to noise ratio at the input to receiver is:

Question 13

Number of state variable required for the state space representation of circuit is-

Question 14

For the amplifier configuration with noise source, the output signal to noise ratio interns of the input signal to noise ratio of Approximates

Question 15

Consider the signal S(t) shown in the figure below.

This signal is applied to its matched filter after contaminated with an AWGN noise. If the two sided PSD of the noise is, then the maximum signal to noise ratio possible at the output of the filter will be?

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ESE & GATE EC General

May 13ESE & GATE EC