Network Analysis and Synthesis - ECE Questions and Answers

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If I_a, I_b, I_c are line currents and I_a1 is the positive sequences component of I_a then

I_a1 = I_a + I_b + I_c

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If the numerator of Z(s) is one degree higher than denominator, Z(s) has a pole at infinity.

True

False

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An m derived low pass filter has f_c = 1000 Hz, f_∞ = 1250 Hz and m = 0.6. If m is increased, then

both f_c and f_∞ will increase

both f_c and f_∞ will decrease

f_c will remain constant but f_∞ will decrease

f_c will remain constant but f_∞ will increase

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In the two ports network shown in the figure, Z₁₂ and Z₂₁ are, respectively

r_e and βr₀

0 and - βr₀

0 and βr₀

r_e and - βr₀

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In figure, I = 2A, then V =

5 V

3 V

2 V

1 V

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The design of wave filter is based on characteristic impedance which is

pure resistance

pure reactance

pure resistance in pass band and pure reactance in attenuation band

pure reactance in pass band and pure resistance in attenuation band

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A system is said to be marginal stable if

poles lies on Real axis

zero lies on Real axis

poles lies on Imaginary axis

zeros lies on origin

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Assertion (A): In state space analysis, capacitors are taken to be in tree.

Reason (R): State variable analysis is very suitable for computer solution.

Both A and R are true and R is correct explanation of A

Both A and R are true and R is not the correct explanation of A

A is true but R is false

A is false but R is true

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In the circuit shown in the given figure, V₀ is given by

sin t

cos t