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JAMB - Physics (1979 - No. 36)

Radio carrier waves are generated by causing electrons to oscillate rapidly in
a microphone
a television camera
an antenna
coaxial cables
a transmitter

Giải thích

Transmitters transform electrical signals into radio waves, causing electrons to oscillate rapidly, producing the carrier waves essential for communication. These waves are then transmitted through the air to receivers, allowing for transferring information such as audio, video, and data.

NOTE: Radio waves are generated artificially by an electronic device called a transmitter, which is connected to an antenna, which radiates the waves. They are received by another antenna connected to a radio receiver, which processes the received signal.

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