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UP polytechnic Lecturer (EE) Quiz 10

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Question 1

The aerial current of an AM transmitter is 18 A when unmodulated, but increases to 20 A when modulated. The modulation index is

Question 2

In amplitude modulation AM, if modulation index ismore than 100% then:

Question 3

What will be the total modulation index if a wave is amplitude modulated by three sine waves with modulation indices of 25%, 50% and 75%?

Question 4

A modulating signal has frequency f_m and modulation index of 10. Find the bandwidth in case of FM.

Question 5

An amplitude-modulated amplifier has a radio frequency output of 60 W at 100% modulation. The internal loss in the modulator is 6 W. What is the unmodulated carrier power?

Question 6

In FM modulation, when the modulation index increases the transmitted power is

Question 7

In a PCM system of telemetry, the quantization noise depends on:

Question 8

For Base-band binary PAM system, bit-rate and roll of factor is 56 Kbps and 0.25, respectively. The Bandwidth requirement is

Question 9

A discrete source generates 8 symbols with equal probability. The entropy is:

Question 10

Which one of the following provides a reliable connection for the transfer of data between applications?

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AE & JE Exams

May 13AE & JE Exams