71. Which one of the following theorems can be conveniently used to calculate the power consumed by the 10 Ω resistor in the network shown in the figure below?
72. With 10 V DC connected at port A in the linear nonreciprocal two port network shown below, the following were observed
1. 1 Ω connected at port B draws a current of 3 A
2. 2.5 Ω connected at port B draws a current of 2 A
The current drawn by 7 Ω connected at port B
1. 1 Ω connected at port B draws a current of 3 A
2. 2.5 Ω connected at port B draws a current of 2 A
The current drawn by 7 Ω connected at port B
73. The open circuit parameters of 2-port network N shown in the figure, are \[\left[ {\begin{array}{*{20}{c}}
{{{\text{Z}}_{11}}}&{{{\text{Z}}_{12}}} \\
{{{\text{Z}}_{21}}}&{{{\text{Z}}_{22}}}
\end{array}} \right].\] When the network is extended by a resistance R as shown in the figure, the input impedance of the network at points A, B will be
74. The time constant of the network shown in the given figure is given by
75. For non-inverting adder, which theorem is applicable to determine the expression for output voltage?
76. For a certain load, the true power is 100 W and the reactive power is 100 VAR. What is the apparent power?
77. What power absorbed by R
78. For the circuit shown in figure
79. R and C are connected in parallel across a sinusoidal voltage source of 240 V. If the currents through the source and the capacitor are 5 A and 4 A respectively, what is the value of R?
80. For the circuit shown in the below figure, what is the natural frequency?
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