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LMRC 2018 JE EC Exam: Tech Quiz 7

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Question 1

The state variable description of an LTI system is given by


where y is the output and u is the input. The system is controllable for

Question 2

A Causal system is the one in which the output depends upon

Question 3

A transformer has 2% resistance and 5% reactance. What is its voltage regulation at full load with 0.8 p.f. lagging?

Question 4

When a ferromagnetic substance is magnetized, there are marginal diminiutions in its linear dimensions. This phenomenon is called

Question 5

A 40Ω, 4.2 meters long lossless line is operated at 75MHz. The phase velocity is 0.2c and the input impedance at the middle of the line is 60 - j50Ω. What is the voltage reflection coefficient at the load?
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Aug 21ESE & GATE EC