In PCM if the transmission path is very long

Television signals are

In FM, when frequency deviation is doubled, then

To cover a population of 20 lakh, a transmission tower should have a height: (ra

In an amplitude modulated wave for audio frequency of 500 cycle/second, the appr

An audio frequency of 10 kHz is transmitted by SSB after AM with carrier waves o

12 signals each band limited to 5 kHz are to be transmitted by frequency-divisio

The service area of space wave communication increases by

Audio signal cannot be transmitted because

For a radio wave reaching the ionised medium

Which of the following is drawback of amplitude modulation?

As the height of satellite orbit gets lower, the speed of the satellite

The AM wave is equivalent to the summation of

Wave obtained on superimposition of audible frequency e.m. wave is known as

During ground wave propagation the transmitted waves gets attenuated because

Buffer amplifier is used at the transmitting end to

The term channel is used to indicate

A transducer used at the transmitting end, serves the purpose of converting

Which of the following is the element of a communication system?

Communication is the process of

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An electric field is applied to a semiconductor. Let the number of charge carrie

Choose the correct option Assertion : A pure semiconductor has negative temperat

If the forward bias on p-n junction is increased from zero to 0.045 V, then no c

In the half wave rectifier circuit operating from 50 Hz mains frequency, the fun

The peak voltage in the output of a half-wave diode rectifier fed with a sinusoi

If a small amount of antimony is added to germanium crystal

The drift current in a p-n junction is from the

Electric conduction in a semiconductor takes place due to

The electrical conductivity of pure germanium can be increased by