Physics for IGCSE & O level - Rays And Waves (Section 4 - No. 37)
What are the main components of a telephone?
Transmitter, receiver, antenna
Microphone, encoder, transmission path, decoder, earphone
Encoder and decoder
Amplifier and speaker
स्पष्टीकरण
A telephone system consists of a microphone, encoder, transmission path, decoder and earphone