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- Question 1 of 14
##### 1. Question

Let s(t) = rect(t-3/3) be a signal passed through an AWGN (additive white Gaussian noise) channel with noise power spectral density PSD No/2 to get v(t). If v(t) is passed through a matched-filter that is matched to s(t) then output signal to noise ratio (SNR) of the matched filter is

CorrectIncorrect - Question 2 of 14
##### 2. Question

Let f : [−1,1]→R, where f (x) = 2×3 − x4 −10. The minimum value of f (x) is (number after x denotes power of x that is x3 is cube of x)

CorrectIncorrect - Question 3 of 14
##### 3. Question

An urn contains 5 red and 7 green balls. A ball is drawn at random and its colour is noted. The ball is placed back into the urn along with another ball of the same colour. The probability of getting a red ball in the next draw is

CorrectIncorrect - Question 4 of 14
##### 4. Question

A symmetrical three-phase three-wire RYB system is connected to a balanced delta-connected load. The RMS values of the line current and line-to-line voltage are 10 A and 400 V respectively. The power in the system is measured using the two wattmeter method. The first wattmeter connected between R-line and Y-line reads zero. The reading of the second wattmeter (connected between Bline and Y-line) in watt is

CorrectIncorrect - Question 5 of 14
##### 5. Question

The fundamental period No of the discrete-time sinusoid x(n) = sin (301*pi*n/4) is (where pi is constant 3.14)

CorrectIncorrect - Question 6 of 14
##### 6. Question

A coil is tested with a series type Q-meter. Resonance at a particular frequency is obtained with a capacitance of 110 pF. When the frequency is doubled, the capacitance required for resonance is 20 pF. The distributed capacitance of the coil in pico farad is

CorrectIncorrect - Question 7 of 14
##### 7. Question

A 200 mV full scale dual-slope 3 ½ digit DMM has a reference voltage of 100 mV and a first integration time of 100 ms. For an input of [100 + 10 Cos(100πt)] mV, the conversion time (without taking the auto-zero phase time into consideration) in millisecond is

CorrectIncorrect - Question 8 of 14
##### 8. Question

The bandgap in eV of a semiconductor material required to construct an LED that emits peak power at the wavelength of 620 nm is

CorrectIncorrect - Question 9 of 14
##### 9. Question

The signal m(t) = sin(100*pi*t)/100*pi*t is frequency modulated (FM) with an FM modulator of frequency deviation constant of 30 kHz/V.Using Carson’s rule the approximation bandwidth of the modulated wave in Kilohertz is

CorrectIncorrect - Question 10 of 14
##### 10. Question

A signal m(t) varies from −3.5 V to +3.5 V with an average power of 3 W. The signal is quantized using a midtread type quantizer and subsequently binary encoded. With the codeword of length 3, the signal to quantization noise ratio in dB is

CorrectIncorrect - Question 11 of 14
##### 11. Question

Let A be an n*n matrix with rank r(0

CorrectIncorrect - Question 12 of 14
##### 12. Question

The torque transmitted by a cylindrical shaft is to be measured by using two strain gauges.The angles for mounting the strain gauges relative to the axis of the shaft for maximum sensitivity are

CorrectIncorrect - Question 13 of 14
##### 13. Question

A p type semiconductor strain gauge has a nominal resistance of 1000 ohm and a gauge factor of +200 at 25 degree C.The resistance of the strain gauge in ohms when subjected to strain of .0001 m/m at the same temperature is

CorrectIncorrect - Question 14 of 14
##### 14. Question

Liquid flow rate is measured using

CorrectIncorrect