Modulation

The diagram given below shows the block diagram of a detector for AM signals.


Label the unlabelled boxes in this block diagram indicated by (b) and (c).

A carrier wave of peak voltage $12 \mathrm{V}$ is used to transmit a message signal. The peak voltage of the modulating signal in order to have a modulation index of $75\%$ is

Which of the following factors justify the need of modulating a signal:

Among following, the factor which justifies the need of modulating a signal is

The most common application of amplitude modulation is Broadcast transmissions.Given statement is true or false.

AM signal are reflected back to earth from _____ layer?

What are the applications of amplitude modulation?

Which kind of modulation is almost resilient to noise.

The advantage of phase modulation is that, when the information is being transmitted without _____ then the speed rates can be observed.

Describe the advantages of phase modulation?

Frequency modulation large _____ is required.

The disadvantage of frequency modulation is that its equipment cost is higher, has a large bandwidth. This statement is true or false?

What are some disadvantages of using frequency modulation?

Which of the following modes of transmission has the lowest noise immunity?

__________ type of transmission, one complete side-band of the signal and half of the remaining side-band is sent together. Enable GingerCannot connect to Ginger Check your internet connection
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Which of the following is a type of amplitude modulation?

In the communication systems, AM is used for broadcasting because

A signal of $5 \mathrm{kHz}$ frequency is amplitude modulated on a carrier wave of frequency $2 \mathrm{MHz}$. The frequencies of the resultant signal is/are:

A signal of frequency $20 \mathrm{kHz}$ and peak voltage of $5 \mathrm{Volt}$is used to modulate a carrier wave of frequency $1.2 \mathrm{MHz}$and peak voltage $25 \mathrm{Volts}$. Choose the correct statement.

Choose the correct statement: