For a transmission line open circuit and short circuit impedances are 20 ? and 5

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Question
For a transmission line open circuit and short circuit impedances are 20 ? and 5 ?. Then characteristic impedance is
Options
A. 100 ?
B. 50 ?
C. 25 ?
D. 10 ?

Correct Answer

10 ?

Explanation

Z₀ = Z_oc Z_sc .

Networks Analysis and Synthesis problems

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1. Which of the following is correct for a driving point functions?
Options
A. The real parts of all poles must be negative
B. The real parts of all poles and zeros must be negative
C. The real parts of all poles and zeros must be negative or zero
D. The real parts of all zeros must be negative

3. A capacitor is needed for an ac circuit of 230 V, 50 Hz the peak voltage rating of the capacitor should be
Options
A. 230 V
B. 0.5 x 230 V
C. 2 x 230V
D. 230/2V

4. Two networks are cascaded through an ideal buffer. If t_d1 and t_d2 are delay times of network, the overall delay time is
Options
A. t_d1 + t_d2
B. t²_d1 + t²_d2
C. t_d1 + t_d2
D.

5. As compared to the number of network elements in Brune synthesis, the number of network elements Bott-and Duffin in realization is
Options
A. more
B. less
C. equal
D. any of the above

6. In figure, the current supplied by battery immediately after switching on the circuit is
Options
A. 1 A
B. 4 A
C. 10 A
D. 0

7. A cable has an insulation resistance of 10¹⁰ ohms. If the length is doubled, the insulation resistance will be
Options
A. 2 x 10¹⁰ ?
B. 0.5 x 10¹⁰ ?
C. 10¹⁰ ?
D. 4 x 10¹⁰ ?

8. A series RL circuit has . If a voltage 4 sint + 4t is applied, the steady state current will be
Options
A. 4 sin (4t - 45�)
B.
C.
D.

9. The drift velocity of electrons is
Options
A. very small as compared to speed of light
B. equal to speed of light
C. almost equal to speed of light
D. half the speed of light

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