Q.

What is found in frequency modulation?

A. Fixed frequency
B. Fixed dimension
C. Change in frequency and dimension
D. Change in dimension only
Answer» A. Fixed frequency
Explanation: Frequency modulation (FM) conveys information over a carrier wave by varying its instantaneous frequency. This contrasts with amplitude modulation, in which the amplitude of the carrier is varied while its frequency remains constant. Frequency modulation is also used in telemetry, radar, seismic prospecting and newborn EEG seizure monitoring.
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