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CBSE-NET 2017 EC Exam: Practice Quiz 7

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Question 1

In the feedback network shown, what must be the degrees of phase shift so that the inverting amplifier circuit can oscillate?

Question 2

When the modulating frequency is doubled, the modulation index is halved, and the modulating voltage remains constant. The modulation system is
1) Amplitude modulation
2) Phase modulation
3) Frequency modulation
Select the correct answer from the codes given below:

Question 3

The transfer function will have

Question 4

With asynchronous preset and clear inputs, output of JK flipflop results as 1.

Which is correct that can be applied to change output of JK flip flop from 1 to 0 state?

Question 5

The cumulative distribution function of a random variable x is the probability that X takes the value
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Feb 9ESE & GATE EC