Q.1
The approximate aspect ratio for television is ________
  • a) 2 : 1
  • b) 3 : 2
  • c) 4 : 3
  • d) 3 : 4
Q.2
Signal to Noise ratio for a hi-fi system is equal to ________
  • a) 50 dB
  • b) 100 dB
  • c) 75 dB
  • d) 10 dB
Q.3
What is the use of SSB?
  • a) It has lesser bandwidth
  • b) It has large bandwidth
  • c) It has infinite bandwidth
  • d) It has zero bandwidth
Q.4
Approximate how many times odd and even fields of television system are scanned?
  • a) 25 times each
  • b) 50 times each
  • c) 50 times each but alternately
  • d) 25 times each but alternately
Q.5
Any signal and its Hilbert transform have same energy density spectrum.
  • a) True
  • b) False
Q.6
If the spectrum of a narrow band noise is symmetrical and it has a power density spectrum 4×10-Power density of quadrature component is ________
  • a) 2 x 10-6
  • b) 5 x 10-6
  • c) 3 x 10-6
  • d) 4 x 10-6
Q.7
What is the capacitive reactance for DC signals?
  • a) zero
  • b) very low
  • c) equal to one
  • d) infinite
Q.8
If a FM signal having modulation index mf is passed through a frequency tripler, then the modulation index of output of frequency tripler is ________
  • a) mf
  • b) 3mf
  • c) 1⁄3 mf
  • d) 1⁄9 mf
Q.9
What are the two major drawbacks of delta modulation?
  • a) Slope Overload and Granular noise
  • b) Slope Overload and Serration noise
  • c) Serration noise and Granular noise
  • d) Slope Overload and Channel Noise
Q.10
Beam width of antenna is expressed in ________
  • a) metres
  • b) degrees
  • c) radian
  • d) volt
0 h : 0 m : 1 s