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BARC Full Syllabus Test 17

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Question 1

The output of filter is a

Question 2

Consider the circuit shown in the figure below:

The diode D1 in the figure shown below can be replaced by a 0.7 V battery when it is forward biased by a voltage greater than or equal to 0.7V. If the current source a ramp function i.e. , then the output can be represented as.

Question 3

For the system shown in Fig below, in order to reduce C1 by 1%, the percentage reduction that has to be done on G for given input, is

Question 4

For a logic function F(A, B, C) = Σm(1, 2, 4, 7), if we realize it by using a 4 ×1 MUX having select lines as B, C then the input at D3, D2, D1, D0 where D0 is LSB, will be respectively?

Question 5

A power amplifier delivers 50 W output at 50% efficiency. The ambient temperature is 25°C. If the maximum allowable junction temperature is 150°C, then the maximum thermal resistance θJC that can be tolerated is

Question 6

The minimum step-size required for a Delta modulator operating at 32K samples/sec to track the signal [u(t) is unit function].

x(t) = 125t(u(t) – u(t – 1)) + (250 – 125t) (u(t – 1) – u(t – 2))

So that slope overload is avoided, would be ?

Question 7

Consider the state-transition matrix of a LTI system is given by and having initial state as and the input signal as . Where is the unit-step input signal. Then the zero-input response of the system is given by

Question 8

For a clocked sequential circuit. Shown in figure.

The output sequence for on input sequence of 101001 assuming initial state to be Q1Q0 = 0 0

Question 9

An uniform plane wave that is propagating in a medium with , and peak electric field of 8V/m. Now, determine the peak magnetic field intensity.

Question 10

Find I in the given circuit if β is very large. Assume transistors are identical.

Question 11

A carrier signal is modulated by a signal For frequency sensitivity of the bandwidth of FM signal is given by

Question 12

An air line has a characteristic impedance of 70 and a phase constant of 3 rad/m at 100MHz. The inductance per meter and the capacitance per meter of the line is

Question 13

The value of  at  is

Question 14

The unit impulse response of a system is given as c(t) = -4e-t + 6e-2t. The step response of the same system for t≥0 is equal to :

Question 15

is
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Sep 12ESE & GATE EC