# Noise with double-sided power spectral density of K over all frequencies is passed through a RC low pass filter with 3dB cut-off frequency of f. The noise power at the filter output is

1.  k

2.  K fc

3.  K πfc

4.  ∞

4

K πfc

Explanation :
No Explanation available for this question

# Consider a Binary Symmetric Channel (BSC) with probability of error being p. To transmit abit,  say  1,  we  transmit  a  sequence  of  three  1s.  The  receiver  will  interpret the  received sequence to represent 1 if a least two bits are 1. The probability that the transmitted bit will be received in error is

1.  p3 + 3p2(1 - p)

2.  p3

3.  (1 - p)3

4.  p3 + p2(1 – p)

4

p3 + 3p2(1 - p)

Explanation :
No Explanation available for this question

# The built in potential of the junction

1.  is 0.70V

2.  is 0.76V

3.  is 0.82V

4.  cannot be estimated from the data given

4

is 0.76V

Explanation :
No Explanation available for this question

# Consider a Binary Symmetric Channel (BSC) with probability of error being p. To transmit abit,  say  1,  we  transmit  a  sequence  of  three  1s.  The  receiver  will  interpret the  received sequence to represent 1 if a least two bits are 1. The probability that the transmitted bit will be received in error is

1.  p3 + 3p2(1 - p)

2.  p3

3.  (1 - p)3

4.  p3 + p2(1 - p)

4

p3 + p2(1 - p)

Explanation :
No Explanation available for this question

# Four message band  limited  to W, W, 2W and 3W respectively are  to be multiplexed using Time Division Multiplexing  (TDM).  The minimum  band width  required  for  transmission  of this TDM signal is

1.  w

2.  3W

3.  6W

4.  7W

4

7W

Explanation :
No Explanation available for this question

# Consider the frequency modulated signal 10 cos[2π x 105t + 5sin(2π x 1500t) + 7.5sin(2π x 1000t] with carrier frequency of 105 Hz. The modulation index is

1.  12.5

2.  10

3.  7.5

4.  5

4

5

Explanation :
No Explanation available for this question

# The peak electric field in the device is

1.  0.15 MV.cm-1, directed from p-region to n-region

2.  0.15 MV.cm-1, directed from n-region to p-region

3.  1.80 MV.cm-1, directed from p-region to n-region

4.  1.80 MV.cm-1, directed from n-region to p-region

4

0.15 MV.cm-1, directed from n-region to p-region

Explanation :
No Explanation available for this question

# The signal cosωct – 0.5 cosωmt sinωct is

1.  FM only

2.  AM only

3.  both AM and FM

4.  neither AM nor FM

4

AM only

Explanation :
No Explanation available for this question

# If  the bits 0 and 1 are  transmitted using bipolar pulses,  the minimum band width  required for distortion free transmission is

1.  64 kHz

2.  32 kHz

3.  8 kHz

4.  4 kHz

4

32 kHz

Explanation :
No Explanation available for this question

# Which of the following statements is true

1.  G(s) is an all-pass filter

2.  G(s) has a zero in the right-half plane

3.  G(s) is the impedance of a passive network

4.  G(s) is marginally stable

4