Answer to Question #173623 in Physics for ANJU JAYACHANDRAN

Question

1. State with reasons whether the following statements are True or False. (210)

i) Rise time of a pulse is the time required for the amplitude to reach from 0% to

100% of the peak amplitude value.

ii) All types of device noise are white noise.

iii) Standing wave ratio of a matched transmission line is infinite. 

iv) Frequency modulation index mf is independent of carrier frequency.

v) Frequency shift keying is modulation of digital carrier signal with an analog 

intelligent signal.

vi) In superheterodyne receiver the local oscillator always operates at a fixed 

frequency.

vii) The depth of LCD TV depends on the size of its screen.

viii) Waveguide attenuator causes rotation of plane of polarization of the wave.

ix) Token ring protocol suffers with the data collision problem.

x) WAP helps in connecting devices without cables.

Answer 1

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