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Exam Questions Papers - Engineering

Q1:

An electrical system and its signal-flow graph representation are shown in figure (a) and (b) respectively

The values of G2 and H, respectively are

A

B

C

D

ANS:A -

Vi(s) = Z1I1 + Z3(I1 - I2) ...(i) V0(s) = Z4I2 I2(Z3 + Z2 + Z4) = Z3I1 ...(ii) From signal flow graph I2 = I1G2 ⇒ Hence, ...(iii) From SFG ...(iv) From (ii), (iii), (iv) we get H.