Explore topic-wise MCQs in Network Theory.

This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Network Theory knowledge and support exam preparation. Choose a topic below to get started.

1.

A series RLC circuit has a resonant frequency of 550 Hz. The maximum voltage across C is likely to occur at a frequency of ___________

A. 1000 Hz
B. 2000 Hz
C. 1025 Hz
D. 500 Hz
Answer» E.
Discussion
2.

When a lead acid battery is being charged, the specific gravity of the electrolyte will ___________

A. Decrease
B. Increase
C. Either Increase or Decrease
D. Neither Increase nor Decrease
Answer» C. Either Increase or Decrease
Discussion
3.

A resistance R is connected to a voltage source V having internal resistance RI. A voltmeter of resistance R2 is used to measure the voltage across R. The reading of the voltmeter is _____________

A. \(\frac{V_S R_1 R_2}{R_2 R_1 + R_1 R + RR_2}\)
B. \(\frac{V_s R}{R + R_s}\)
C. \(\frac{VR_1 R_2}{R_1 R_2 – R_1 R – RR_2}\)
D. \(\frac{V_S RR_2}{R_1 R_2 + R_1 R + RR_2}\)
Answer» E.
Discussion
4.

Consider a circuit having resistances 2 Ω and 2 Ω in series with an inductor of inductance 2 H. The circuit is excited by a voltage of 12 V. A switch S is placed across the first resistance. Battery has remained switched on for a long time. The current i(t) after switch is closed at t=0 is _____________

A. 6
B. 6 – 3e-t
C. 6 + 3e-t
D. 3 – 6e-t
Answer» C. 6 + 3e-t
Discussion
5.

Two capacitors of 0.5 μF and 1.5 μF capacitance are connected in parallel across a 110 V dc battery. The charges across the two capacitors after getting charged is ___________

A. 55 μC each
B. 275 μC each
C. 55 μC and 275 μC respectively
D. 275 μC and 55 μC respectively
Answer» D. 275 μC and 55 μC respectively
Discussion
6.

In the circuit given below, the value of R in the circuit, when the current is zero in the branch CD is _________

A. 10 Ω
B. 20 Ω
C. 30 Ω
D. 40 Ω
Answer» E.
Discussion
7.

In the circuit given below, the voltage across the 18 Ω resistor is 90 V. The voltage across the combined circuit is _________

A. 125 V
B. 16 V
C. 24 V
D. 40 V
Answer» B. 16 V
Discussion
8.

In the circuit given below, the values of V1 and V2 respectively are _________

A. 0 and 5V
B. 5 and 0 V
C. 5 and 5 V
D. 2.5 and 2.5 V
Answer» E.
Discussion
9.

In the circuit given below, the value of IX using nodal analysis is _______

A. -2.5 A
B. 2.5 A
C. 5 A
D. -5 A
Answer» C. 5 A
Discussion
10.

In the circuit given below, the voltage across the 2Ω resistor is ________

A. 3.41 V
B. -3.41 V
C. 3.8 V
D. -3.8 V
Answer» C. 3.8 V
Discussion
11.

Viewed from the terminals A and B the circuit given below can be reduced to an equivalent circuit with a single voltage source in series with a resistor with ________

A. 5 V source in series with 10 Ω resistor
B. 1 V source in series with 2.4 Ω resistor
C. 15 V source in series with 2.4 Ω resistor
D. 1 V source in series with 10 Ω resistor
Answer» C. 15 V source in series with 2.4 Ω resistor
Discussion
12.

Currents I1, I2 and I3 meet at a junction in a circuit. All currents are marked as entering the node. If I1 = -6sin(ωt) mA and I2 = 8 cos(ωt) mA, the I3 is ________

A. 10 cos(ωt + 36.87) mA
B. 14 cos(ωt + 36.87) mA
C. -14 sin(ωt + 36.87) mA
D. -10 cos(ωt + 36.87) mA
Answer» E.
Discussion
13.

In the circuit given below, the resistance between terminals A and B is 7Ω, between terminals B and C is 12Ω and between terminals C and A is 10Ω. The remaining one terminal in each case is assumed to be open. Then the value of RA and RB are _________

A. RA = 9 Ω and RB = 7 Ω
B. RA = 2.5 Ω and RB = 4.5 Ω
C. RA = 3 Ω and RB = 3 Ω
D. RA = 5 Ω and RB = 1 Ω
Answer» C. RA = 3 Ω and RB = 3 Ω
Discussion
14.

In the circuit given below, the value of R is _________

A. 10 Ω
B. 18 Ω
C. 24 Ω
D. 12 Ω
Answer» E.
Discussion