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Communication Systems - Engineering

Q1:

A remote control for TV uses

A LED in receiver and photodiode in transmitter

B LED in transmitter and photodiode in receiver

C LED in both transmitter and receiver

D Photodiode in both transmitter and receiver

ANS:B - LED in transmitter and photodiode in receiver

Infrared LED transmits the pulse. At receiver photo diode converts infrared signals into electrical signals.