(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

2. Relevant equations

To find Ca / Rb we take Ra = 0--- is this right?

I used mason's formula

P1 = -G2 G1 H1

Loop = G1, G2, -H1, -H2

Using Mason's Gain we get:

Delta1 = 1

Delta = 1 - G1G2H1H2

Using Mason's Gain

TF = -G1G2H1 Divided by ( 1 - G1G2H1H2)

But substituting the values I don't get the answer that matches any options.

3. The attempt at a solution

Substituting I get:

This gives answer in cube as second term of numerator will go in cube for s. None of options have s cube.

Second Question:

I think the options are wrong.

For left TF we get C(s)/R(s) = 10/11

For Right we get C(s)/R(s) = 5/3.5

Multiplying them doesn't give the answer

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# Homework Help: Control System: Find the Transfer Function From Block Diagram

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