Question 1

For a transmission line open circuit and short circuit impedances are 20 Ω and 5 Ω. Then characteristic impedance is

Accepted Answer

Z0 = Zoc Zsc .

Question 2

In figure, the current supplied by battery immediately after switching on the circuit is

Accepted Answer

At t = 0, inductance behaves as open circuit.

Question 3

A cable has an insulation resistance of 1010 ohms. If the length is doubled, the insulation resistance will be

Accepted Answer

Insulation resistance of cable is inversely proportional to length.

Question 4

A series RL circuit has . If a voltage 4 sint + 4t is applied, the steady state current will be

Accepted Answer

R = 4 Ω, L = 1 H, ω = 4 rad/sec, XL = 4 Ω

Question 5

The drift velocity of electrons is

Accepted Answer

Drift velocity of electrons is very small.

Question 6

In a parallel resonant circuit, the circuit current at resonance is maximum.

Accepted Answer

In parallel resonance current is minimum.

Question 7

The terms RMS and average values apply only to sine waves.

Accepted Answer

These terms are applicable to all waveshapes.

Question 8

In an ac circuit, the maximum and minimum values of power factor can be

Accepted Answer

Power factor is maximum and equal to 1 for purely resistive load. Power factor is minimum and equal to zero for purely reactive load.

Question 9

The synthesis of minimum function was suggested by

Accepted Answer

The procedure is called Brune's synthesis.

Question 10

Wave A = 100 sin ωt and wave B = 100 cos ωt. Then

Accepted Answer

Since peak values are equal, their rms values are equal irrespective of phase difference.

Networks Analysis and Synthesis Questions