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Network Theory
Network Theory Objective
Quiz 1
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Q.1
A capacitor ofV,Hz is needed for AC supply. The peak voltage of the capacitor should be ____________
a) 110 V
b) 460 V
c) 220 V
d) 230 V
Q.2
A two branch parallel circuit has aΩ resistance andH inductance in one branch and a 1 μF capacitor in the second branch. It is fed fromV ac supply, at resonance, the input impedance of the circuit is _____________
a) 447.2 Ω
b) 500 Ω
c) 235.48 Ω
d) 325.64 Ω
Q.3
The impedance matrices of two, two-port network are given by [32and [5 25]. The impedance matrix of the resulting two-port network when the two networks are connected in series is ____________
a) [3 5; 2 25]
b) [18 7; 7 28]
c) [15 2; 5 3]
d) Indeterminate
Q.4
The electrical energy required to heat a bucket of water to a certain temperature iskWh. If heat losses, are 10%, the energy input is ____________
a) 2.67 kWh
b) 3 kWh
c) 2.5 kWh
d) 3.5 kWh
Q.5
The current rating of a cable depends on ___________
a) Length of the cable
b) Diameter of the cable
c) Both length and diameter of the cable
d) Neither length nor diameter of the cable
Q.6
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
Q.7
In the circuit given below, the series circuit shown in figure, for series resonance, the value of the coupling coefficient, K will be?
a) 0.25
b) 0.5
c) 0.1
d) 1
Q.8
In an RC series circuit R =Ω and XC =Ω. Which of the following is possible?
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°
Q.9
The impedance of an RC series circuit isΩ at f =Hz. At f =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
Q.10
A 3 phase balanced supply feeds a 3-phase unbalanced load. Power supplied to the load can be measured by ___________
a) 2 Wattmeter and 1 Wattmeter
b) 2 Wattmeter and 3 Wattmeter
c) 2 Wattmeter and 2 Wattmeter
d) Only 3 Wattmeter
Q.11
A series RC circuit has R =Ω and C = 1 μF. The current in the circuit is 5 sin 10t. The applied voltage is _____________
a) 218200 cos (10t – 89.99°)
b) 218200 sin (10t – 89.99°)
c) 218200 sin (10t)
d) 218200 cos (10t)
Q.12
A capacitor stores 0.at 5 V. Its capacitance is ____________
a) 0.75 F
b) 0.75 μF
c) 0.03 F
d) 0.03 μF
Q.13
For a transmission line, open circuit and short circuit impedances areΩ andΩ. Then characteristic impedance is ____________
a) 100 Ω
b) 50 Ω
c) 25 Ω
d) 200 Ω
0 h : 0 m : 1 s
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