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UPPCL AE 2018: Quiz 24

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Question 1

Loop gain in positive feedback is

Question 2

A uniformly distributed random signal x[n] with mean m_x=2 and variance

, is passed through a 3-point moving-average filter having an impulse response {h[n]}=

,What will be the mean and variance of output?

Question 3

Which of the following statement is true regarding the ripple counter -

Question 4

The highest frequency for which a circular coaxial transmission line having outer diameter = 3.1 mm and inner diameter = 1.3 mm can be operated in pure TEM mode (assuming free space medium between the two conductors) should be less then:

Question 5

The reactance of 1 farad capacitance when connected to a DC circuit is

Question 6

A 5V reference is drawn from the circuit shown in the figure. Zener diode of 400mW and 5V with firing current of 5mA is used. The value of R_s is

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