**Q1.** What do you mean by transfer function of a system?

**Ans.:** It is defined by the ratio of Laplace transform of output response to Laplace transform of input (excitation) assuming all the initial conditions to be zero.

**Q2.** What do you mean by characteristic equation of a system?

**Ans.:** The denominator polynomial in terms of s of a transfer function is known as characteristic polynomial. If this polynomial is equated to zero, characteristic equation will be obtained.

**Q3.** Define the following:

(i) block diagram (ii) output (iii) summing point (iv) take-off point (v) forward path (vi) feedback path

**Ans.:**

- Block Diagram: The shorthand pictorial representation of the cause and effect relationship between the input and ...

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