Networks Analysis and Synthesis MCQ Questions & Answers

Question 1

A 0.5 μF capacitor is connected across a 10 V battery. After a long time, the circuit current and voltage across capacitor will be

A. 0.5 A and 0 V
B. 0 A and 10 V
C. 20 A and 5 V
D. 0.05 A and 5 V

Question 2

A 3 phase balanced supply feeds 3 phase unbalanced load. Power supplied to the load can be measured by using 2 wattmeterone wattmeter3 wattmeter Which of the above statements is correct?

A. 1 and 2
B. 1 and 3
C. 2 and 3
D. 3 alone

Question 3

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

A. 2 x 1010 Ω
B. 0.5 x 1010 Ω
C. 1010 Ω
D. 4 x 1010 Ω

Question 4

A capacitor is needed for an ac circuit of 230 V, 50 Hz the peak voltage rating of the capacitor should be

A. 230 V
B. 0.5 x 230 V
C. 2 x 230V
D. 230/2V

Question 5

A capacitor stores 0.15C at 5 V. Its capacitance is

A. 0.75 F
B. 0.75 μF
C. 0.03 F
D. 0.03 μF

Question 6

A current is flowing through a conductor with non-uniform area of cross-section. Then

A. current will be different at different cross-sections.
B. current will be the same at all the cross-sections.
C. current will be different but current density will be same at all the cross-sections
D. current will be the same but current density will be different at different cross-sections.

Question 7

A series RC circuit has R = 5 Ω and C = 10 μF. The current in the circuit is 5 sin 20000t. The applied voltage is

A. 252 sin (20000t + 45°)
B. 252 sin (20000t - 45°)
C. 252 sin 20000t
D. 252 sin (20000t - 90°)

Question 8

A sinusoidal voltage has peak to peak value of 100 V. The rms value is

A. 50 V
B. 70.7 V
C. 35.35 V
D. 141.41 V

Question 9

A two branch parallel circuit has a 20 Ω resistance and 1 H inductance in one branch and a 100 μF capacitor in the second branch. It is fed from 100 V ac supply, at resonance, the input impedance of the circuit is

A. 500 Ω
B. 50 Ω
C. 20 Ω
D. 5 Ω

Question 10

An RLC series circuit is underdamped. To make it overdamped, the value of R

A. has to be increased
B. has to be decreased
C. has to be increased to infinity
D. has to be reduced to zero

Question 11

As compared to the number of network elements in Brune synthesis, the number of network elements Bott-and Duffin in realization is

A. more
B. less
C. equal
D. any of the above

Question 12

C = (2) (energy)/V2

A. TRUE
B. FALSE

Question 13

Henry is equivalent to

A. Volts/Ampere
B. Weber/Volt
C. Weber/Ampere
D. Weber/Ampere2

Question 14

In a minimum function

A. the degree of numerator and denominator are equal
B. the degree of numerator and denominator are unequal
C. the degree of numerator is one more than degree of denominator
D. the degree of numerator is one less than degree of denominator

Question 15

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

A. TRUE
B. FALSE

Question 16

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

A. 2 and 0
B. 1 and 0
C. 0 and -1
D. 1 and -1

Question 17

In an R-C series circuit excited by a voltage E, the charge across capacitor at t = 0+ is

A. 0
B. CE
C. CE (1 - e-t/RC)
D. none of the above

Question 18

In an RC series circuit R = 100 Ω and XC = 10 Ω. In this circuit

A. the current and voltage are in phase
B. the current leads the voltage by about 6°
C. the current leads the voltage by about 84°
D. the current lags the voltage by about 6°

Question 19

RMS value of i(t) = 10[1 + sin (- t)] is

A. 10
B. 10-Feb
C. l50
D. 102

Question 20

The current rating of a cable depends on

A. length of cable
B. diameter of cable
C. both length and diameter of cable
D. none of the above

Question 21

The drift velocity of electrons is

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

Question 22

The electrical energy required to heat a bucket of water to a certain temperature is 2 kWh. If heat losses, are 25%, the energy input is

A. 2.67 kWh
B. 3 kWh
C. 2.5 kWh
D. 3.5 kWh

Question 23

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

A. more than 12
B. less than 3
C. more than 3 Ω but less than 12 Ω
D. more than 12 Ω but less than 24 Ω

Question 24

The synthesis of minimum function was suggested by

A. O'Brune
B. R. Richards
C. Bott and Duffin
D. none of the above

Question 25

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

A. TRUE
B. FALSE

Question 26

Two networks are cascaded through an ideal buffer. If td1 and td2 are delay times of network, the overall delay time is

A. td1 + td2
B. t2d1 + t2d2
C. td1 + td2

Question 27

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

A. rms values of the two waves are equal
B. rms values of A is more than that of B
C. rms values of A is less than that of B
D. rms values of the two waves may or may not be equal

Question 28

Which of the following is correct for a driving point functions?

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

Question 29

Which of the following pairs are correctly matched? Brune's realisation : realisation with ideal transformer.Cauer realisation : ladder realisation.Bott Duffin realisation : with non ideal transformer. Select the answer using the following codes:

A. 1, 2 and 3
B. 2 and 3
C. 1 and 3
D. 1 and 2