Back to COMMUNICATION SYSTEMS
NEET UG PHYSICS MCQ: COMMUNICATION SYSTEMS
1
Hard
1 of 1
Application
+4 | -1
Two electrons are moving in opposite direction with speeds 0.8 c and 0.4 c, where c the speed of light in vacuum. Then the relative speed is about
View answer and explanation
Correct option: C
0.9 c
Option C (0.9 c) is correct because it represents the relative speed calculated using the relativistic velocity addition formula.
More Questions from COMMUNICATION SYSTEMS
Practice All Chapter MCQs →
In the communication systems, AM is used for broadcasting because
The maximum and minimum voltage of an amplitude modulated signal are and respectively. The percentage modulation index will be:
Depth of modulation in terms of is
The process of superimposing signal frequency (i.e., audio wave) on the carrier wave is known as
The antenna current of an AM transmitter is 8 A when only the carrier is sent, but it increases to 8.93 A when the carrier is modulated by single sine wave. Find the percentage modulation.
An audio signal of amplitude one half the carrier amplitude is used in amplitude modulation. Calculate the modulation index?