Question

A coil of wire having a resistance of 3.84 ohms and carrying a current of 0.15A is in parallel with an unknown resistance thru which there is a current of 1.44A.. Calculate the unknown resistance R1

Answer 1

Question

Show that the system shown in the figure below oscillates at a frequency of 1 rad/sec.

C(s)

R(s) +

(4s3 +3s +2s+l)

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Transcribed Image Text

C(s) R(s) + (4s3 +3s +2s+l)

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Expert Answer

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27 Ratings

Step 1

This is a unity negative feedback system. For this system to oscillate at some frequency, we need two closed loop poles on the imaginary axis. The characteristics equation (C.E) of the system is shown below:

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Step 2

We can use Routh-Hurwitz table to find out these poles.

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Step 3

By solving the auxilliary equation (A.E) we will get the location of the pol...