Explore topic-wise MCQs in Network Theory Questions and Answers.

This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory Questions and Answers knowledge and support exam preparation. Choose a topic below to get started.

1.

The resistance of a thermistor decreases with increases in __________

A. temperature
B. circuit
C. light control
D. sensors
Answer» C. light control
Discussion
2.

In the figures given below, Value of RA, RB and RC are 20 Ω, 10 Ω and 10 Ω respectively. The resistances R1, R2 and R3 in Ω are ________

A. 2.5, 5 and 5
B. 5, 2.5 and 5
C. 5, 5 and 2.5
D. 2.5, 5 and 2.5
Answer» B. 5, 2.5 and 5
Discussion
3.

If A = 3 + j1, then A4 is equal to __________

A. 3.16 ∠18.4°
B. 100 ∠73.72°
C. 100 ∠18.4°
D. 3.16 ∠73.22°
Answer» C. 100 ∠18.4°
Discussion
4.

In the circuit shown below, the voltage V will be __________

A. – 3V
B. Zero
C. 3 V
D. 5 V
Answer» B. Zero
Discussion
5.

If operator ‘a’ = 1 ∠120°. Then (1 – a) is equal to ____________

A. \(\sqrt{3}\)
B. \(\sqrt{3}\)∠-30°
C. \(\sqrt{3}\)∠30°
D. \(\sqrt{3}\)∠60°
Answer» C. \(\sqrt{3}\)∠30°
Discussion
6.

In the circuit given below, RI = 1 MΩ, RO = 10 Ω, A = 106 and VI = 1μV. Then the output voltage, input impedance and output impedance respectively are _________

A. 1 V, ∞ and 10 Ω
B. 1 V, 0 and 10 Ω
C. 1V, 0 and ∞
D. 10 V, ∞ and 10 Ω
Answer» B. 1 V, 0 and 10 Ω
Discussion
7.

An AC source of RMS voltage 20 V with internal impedance ZS = (1+2j) Ω feeds a load of impedance ZL = (7+4j) Ω in the circuit given below. The reactive power is _________

A. 8 VAR
B. 16 VAR
C. 28 VAR
D. 32 VAR
Answer» C. 28 VAR
Discussion
8.

For the circuit given below, the current I in the circuit is ________

A. –j1 A
B. J1 A
C. Zero
D. 20 A
Answer» B. J1 A
Discussion
9.

For the two circuits shown below, the relation between IA and IB is ________

A. IB = IA + 6
B. IB = IA + 2
C. IB = 1.5IA
D. IB = IA
Answer» D. IB = IA
Discussion
10.

A 1 μF capacitor is connected to 12 V batteries. The energy stored in the capacitor is _____________

A. 12 x 10-6 J
B. 24 x 10-6 J
C. 60 x 10-6 J
D. 72 x 10-6 J
Answer» E.
Discussion
11.

A two branch circuit has a coil of resistance R1, inductance L1 in one branch and capacitance C2 in the second branch. If R is increased, the dynamic resistance is going to ___________

A. Increase
B. Decrease
C. Remains constant
D. May increase or decrease
Answer» C. Remains constant
Discussion
12.

D is the distance between the plates of a parallel plate capacitor. The dielectric constants are ∈1 and ∈2 respectively. The total capacitance is proportional to ____________

A. \(\frac{∈_1 ∈_2}{∈_1+∈_2}\)
B. ∈1 – ∈2
C. \(\frac{∈_1}{∈_2}\)
D. ∈1 ∈2
Answer» B. ∈1 – ∈2
Discussion
13.

Branch current and loop current relation is expressed in matrix form shown below, where Ij represents branch current and Ik represents loop current.

A. [I1; I2; I3; I4; I5; I6; I7; I8] = [0 0 1 0; -1 -1 -1 0; 0 1 0 0; 1 0 0 0; 0 0 -1 -1; 1 1 0 -1; 1 0 0 0; 0 0 0 1] [I1; I2; I3; I4]The rank of the incidence matrix is?
B. 4
C. 5
D. 6
E. 8
Answer» B. 4
Discussion