Communication Systems
Class 12 Physics Communication Systems — elements of a communication system (transmitter, channel, receiver), analog vs digital signals, bandwidth of signals and media, ground/sky/space wave propagation, range of a TV antenna, and amplitude modulation with modulation index, sidebands, production and detection, plus solved NCERT numericals.
Study by topic — one focused page each
Elements of a Communication System
Communication is the act of transmitting information from one place to another. Every communication system, whether a simple telephone call or a satel…
Start this topic → 2Propagation of EM Waves
Radio communication carries information on electromagnetic (EM) waves radiated by an antenna. How a wave travels from transmitter to receiver depends …
Start this topic → 3Modulation
A message (audio) signal has a low frequency and small bandwidth. It cannot be transmitted directly as an EM wave over long distances. Modulation is t…
Start this topic →Chapter-wide tests
Online Test
20 MCQ • 15 min
IMO / Olympiad Practice
Olympiad level • 15 min
📝 Full Chapter Test (Download & Print)
40 marks • 90 min • with answer key