# 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.

4

Explanation :
No Explanation available for this question

# 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

4

negatively charged ions

Explanation :
No Explanation available for this question

# 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

4

380 kHz

Explanation :
No Explanation available for this question

# 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.

4

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

4

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

4

44 kHz

Explanation :
No Explanation available for this question

# 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

4

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.

4

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

4

7.69 - j11.54Ω

Explanation :
No Explanation available for this question

1.

2.

3.

4.

4