30. Consider the building block called ‘Network N’ shown in the figure.  

Let C=100µF and R=10kΩ

Two such blocks are connected in cascade, as shown in the figure.

The transfer function \(v_3(s)\over v_1(s)\) of the cascaded network is

(A) \(s\over 1+s\)

(B) \(s^2\over 1+3s+s^2\)

(C) \(({s\over1+s})^2\)

(D) \(s\over2+s\)


Answer-(B) \(s^2\over 1+3s+s^2\)
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