# An FM signal with modulation index mf is passed through a frequency Tripler. The wave in the output of the Tripler will have a modulation index of

1.  mf/3

2.   mf

3.   3 mf

4.  9 mf

4

3 mf

Explanation :
No Explanation available for this question

# An FM signal with a deviation δ is passed through a mixer, and has its frequency reduced fivefold. The deviation in the output of the mixer

1.  5 δ

2.  indeterminate

3.  δ/5

4.  δ

4

δ

Explanation :
No Explanation available for this question

# The logical expression  is equivalent to

1.  y = AB

2.  Y = AB

3.  y = A + B

4.  y = A + B

4

y = A + B

Explanation :
No Explanation available for this question

# When the modulating frequency is doubled, the modulation index is halved, and the modulating voltage remains constant, the modulation system is

1.  amplitude modulation

2.  phase modulation

3.  frequency  modulation

4.  all of the above

4

frequency  modulation

Explanation :
No Explanation available for this question

# The minters corresponding to decimal number 15 is

1.  ABCD

2.

3.  A + B + C + D

4.

4

Explanation :
No Explanation available for this question

# Which one of the following is not an advantage of FM over AM

1.  Better noise immunity is provided

2.  Lower bandwidth is required

3.  The transmitted power is more useful

4.  Less modulating power is required

4

Lower bandwidth is required

Explanation :
No Explanation available for this question

# A 1000 KHz carrier is simultaneously modulated with 300 Hz, 800 Hz and 2 KHz audio sine waves. The frequencies present in the output will be

1.  1000 KHz, 300 Hz, 800 Hz and 2 KHz

2.  1300 KHz, 1800 Hz, 2100 Hz and 4100 Hz

3.  300 Hz, 500 Hz, 1200 Hz and 998 KHZ

4.  998 KHz, 999.2 KHz, 999.7 KHz, 1000.3 KHz. 10008 KHz and 1002.0 KHZ

4

998 KHz, 999.2 KHz, 999.7 KHz, 1000.3 KHz. 10008 KHz and 1002.0 KHZ

Explanation :
No Explanation available for this question

# The minimized expression for the K-map is shown below

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# system is described by the state equation The transition matrix of the system is

1.

2.

3.

4.

4

Explanation :
No Explanation available for this question

# In high-power AM transmission, modulation is done at

1.  buffer stage

2.  RF power stage

3.  Oscillator stage

4.  IF stage

4

RF power stage

Explanation :
No Explanation available for this question

## Interview Questions

 MongoDB Java Script Node JS PHP JQuery Python