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GATE-EC-Section-Test-5

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Question 1

The correct full wave rectifier circuit is:

Question 2

A speech signal, band limited to 5 KHz with peak to peak between +10 V to – 10 V and the signal is sampled at Nyquist rate and the bits 0 and 1 are transmitted using bipolar pulses. What is minimum bandwidth for distortion free transmission …. (in KHz)

Question 3

If the closed-loop transfer functions of a control system is given as , then its is

Question 4

The Boolean function Y = AB + CD is to be realized using only 2-input NAND gates. The minimum number of gates required is:

Question 5

A transmission line is feeding 1 Watt of power to a horn antenna having a gain of 10 dB. The antenna is matched to the transmission line. The total power radiated by the horn antenna into the free-space is:

Question 6

A heavily doped n − type semiconductor has the following data:
Hole-electron mobility ratio: 0.4
Doping concentration : 4.2 × 10⁸ atoms/m³
Intrinsic concentration : 1.5 × 10⁴ atoms/m³
The ratio of conductance of the n − type semiconductor to that of the intrinsic semiconductor of same material and at the same temperature is given by

Question 7

In the given circuit, the parameter k is positive and the power dissipated in the 2 Ω resistor is 12.5 W. The value of k is ________

Question 8

Let x(t) be a periodic signal with time period T. Let y(t) = x(t – t₀) + x (t + 0) for some t₀. The Fourier series coefficients of y(t) are denoted by b_k. If b_k = 0 for all odd k, then t₀ can be equal to

Question 9

The diagonal clipping in Amplitude Demodulation (using envelope detector) can be avoided if RC time-constant of the envelope detector satisfies the following condition, (here W is message bandwidth and ω is carrier frequency both in rad/sec)

Question 10

The majority carriers in an n-type semiconductor have an average drift velocity v in a direction perpendicular to a uniform magnetic field B. the electric field E induced due to Hall effect acts in the direction

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ESE & GATE EC Digital Circuits

Oct 7ESE & GATE EC