Question

Assertion: FM broadcast is better than AM broadcast
Reason: Noise change is maximum in the amplitude of AM waves
A) Both assertion and reason are correct and the reason is the correct explanation for the assertion.
B) Both assertion and reason are correct and the reason is not the correct explanation for the assertion.
C) Assertion is correct but the reason is incorrect
D) Both assertion and reason are incorrect.

Answer 1

Hint: In FM waves the data packets or waves or carrier waves get charged with the modulating wave and hence it can travel very long distances and reduce noise reduction. AM waves are also used for sending waveforms but there is no noise reduction.

Complete Step by Step Answer:
To generate a frequency modulated signal, the frequency of the radio carrier is changed in line with the amplitude of the incoming audio signal. When the audio signal is modulated onto the radio frequency carrier, the new radio frequency signal moves up and down in frequency.

When the audio signal is modulated onto the radio frequency carrier, the new radio frequency signal moves up and down in frequency. The amount by which the signal moves up and down is important. It is known as the deviation and is normally quoted as the number of kilohertz deviations. As an example, the signal may have a deviation of plus and minus 3 kHz, i.e. ±3 kHz. In this case, the carrier is made to move up and down by 3 kHz.

Step 2:
Amplitude modulation is a process by which the wave signal is transmitted by modulating the amplitude of the signal. It is often called AM and is commonly used in transmitting a piece of information through a radio carrier wave. Amplitude modulation is mostly used in the form of electronic communication.
In general, amplitude modulation definition is given as a type of modulation where the amplitude of the carrier wave is varied in some proportion with respect to the modulating data or the signal.

The AM technique is totally different from frequency modulation and phase modulation where the frequency of the carrier signal is varied in the first case and in the second one the phase is varied respectively.
An electronic communication system converts our message (information) into an electronic signal and the electronic signal carried out by carrier waves to the destination.
Message information or modulating signal
The superposition of modulating signals onto a carrier wave is known as modulation.
Modulation is defined as, varying any one of the fundamental parameters of a carrier wave in accordance with the modulating signal. A carrier wave can be represented as a sine (or) cosine.

Step 3:
So from the above diagram and explanation, we can say that FM broadcast is better than AM broadcast because in AM broadcast electric signals superimpose with the main signal.

Both assertion and reason are correct and the reason is the correct explanation for the assertion. Hence, A is the correct option.

Note:
The difference is in how the carrier wave is modulated or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to incorporate the sound information. With FM, the frequency (the number of times each second that the current changes direction) of the carrier signal is varied.