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In which modulation, frequency of carrier signal is varied with the amplitude of modulating signal?

In which modulation, frequency of carrier signal is varied with the amplitude of modulating signal? Correct Answer FM

In Frequency Modulation, the frequency of carrier wave is varied with the instantaneous amplitude of modulating signal. The general FM modulated expression is : FM (t) = Ac sin (2πfct + βsin(2πfmt)), where symbols have their usual meaning.

Related Questions

Consider the following statements regarding modulation : 1. The communication systems, where a weak signal is transmitted by the use of a modulation is essential in carrier signal. 2. When the frequency of the high frequency signal is varied in accordance with the intensity of the low-frequency weak signal, the modulation is said to be frequency modulation. 3. The process of recovering original baseband signal from the modulated signal is called phase modulation. Which of the above statements are correct ? 
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