An unity feedback system is given as,  G(s) = (K(1 - s))/(s(s + 3)) Indicate the correct root locus diagram

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
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A MOS capacitor made using p type substrate is in the accumulation mode. The dominant charge in the channel is due to the presence of

1.  holes

2.  electrons

3.  positively charged ions

4.  negatively charged ions

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4
Correct Answer :

negatively charged ions


Explanation :
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A device with input x(t) and output y(t) is characterized by: y(t) = x2(t). An FM signal with frequency deviation of 90 kHz and modulating signal bandwidth of 5 kHz is applied to this device. The bandwidth of the output signal is

1.  370 kHz

2.  190 kHz

3.  380 kHz

4.  95 kHz

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4
Correct Answer :

380 kHz


Explanation :
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A signal as shown  in  the  figure  is applied  to a matched  filter. Which of  the  following does represent the output of this matched filter

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

Noise with uniform power spectral density of N0 W/Hz is passed through a filter H ( ω) = 2 exp (-jωtd) followed by an ideal low pass filter of bandwidth B Hz. The output noise power in Watts is

1.  2 N0B

2.  4 N0B

3.  8 N0B

4.  16 N0B

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4
Correct Answer :

4 N0B


Explanation :
No Explanation available for this question

A  carrier  is  phase modulated  (PM) with  frequency  deviation  of  10  kHz  by  a  single  tone frequency  of  1  kHz.  If  the  single  tone  frequency  is  increased  to  2  kHz,  assuming  that phase deviation remains unchanged, the bandwidth of the PM signal is

1.  21 kHz  

2.   22 kHz

3.  42 kHz

4.  44 kHz

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4
Correct Answer :

44 kHz


Explanation :
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An output of a communication channel  is a  random variable v with  the probability density function as shown in the figure. The mean square value of v is

1.  4

2.  6

3.  8

4.  9

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4
Correct Answer :

8


Explanation :
No Explanation available for this question

Which one of the following does represent the electric field lines for the TE02 mode  in  the cross-section of a hollow rectangular metallic waveguide

1.  

2.  

3.  

4.  

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4
Correct Answer :


Explanation :
No Explanation available for this question

Characteristic  impedance  of  a  transmission  line  is  50 Ω.  Input  impedance  of  the  open-circuited  line  is  Z0c  =  100  +  j150  Ω. When  the  transmission  line  is  short-circuited,  then value of the input impedance will be

1.  50Ω

2.  100 + j150Ω

3.  7.69 + j11.54Ω

4.  7.69 - j11.54Ω

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4
Correct Answer :

7.69 - j11.54Ω


Explanation :
No Explanation available for this question

Two  identical and parallel dipole antennas are kept apart by a distance of  ( λ/4)  in  the H-plane. They are fed with equal currents but the right most antenna has a phase shift of +90°. The radiation pattern is given as

1.  

2.  

3.  

4.  

View Answer  
4
Correct Answer :


Explanation :
No Explanation available for this question
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