Network Theory Practice Test 7

1. Obtain the admittance of the last two elements in the parallel combination after transformation in the circuit shown below.

2. The value of 2 [u (t - 1) - u (1 - 2t)] (u ( t + 1) + u (t)) at t = 3 sec is ____________

3. The ratio of voltage transform at the first port to the current transform at the second port is called?

4. What is the steady state value of F (t), if it is known that F(s) = b/(s(s+1)(s+a)), where a>0?

5. What is the steady state value of F (t), if it is known that F(s) = \(\frac{10}{(s+1)(s^2+1)}\)?

6. The impedance of an RC series circuit is 12 Ω at f = 50 Hz. At f = 200 Hz, the impedance will be?

7. What is the steady state value of F (t), if it is known that F(s) = \(\frac{1}{(s+2)^2 (s+4)}\)?

8. The inverse Laplace transform of F(s) = \(\frac{5}{s^2-9}\) is ______________

9. A network has two branches in parallel. One branch contains impedance Z_a and the other branch has impedance Z_b. If it is fed from an AC voltage V of frequency f, the current through Z_a depends, on which of the following?

10. In a transfer function, the degree of numerator polynomial is ___________ than the degree of the denominator polynomial.