List of top Physics Questions on Amplitude Modulation

A carrier wave of frequency \(2\,MHz\) and peak voltage \(15\,V\) is used to modulate a message signal of frequency \(20\,kHz\) and peak voltage \(8\,V\). The frequencies of side bands produced are

Over modulation occurs when modulation index 'm' is:

An audio signal \( 10 \sin 2\pi(1500)t \) volt amplitude modulates a carrier \( 40 \sin 2\pi(10^5)t \) volts. The modulation factor and percentage modulation are:

If $f_{m}$ is a modulating frequency and $f_{c}$ is carrier wave frequency, then Bandwidth in Amplitude Modulated wave is

The maximum amplitude of an AM wave is found to be \(20\ \text{V}\) while its minimum amplitude is \(4\ \text{V}\). The modulation index is:

A carrier wave is used to transmit a message signal. If the peak voltage of modulating signal and carrier signal are increased by \(1\%\) and \(3\%\) respectively, the modulation index is changed by