Network Theory Interview Questions and Answers for freshers on “Compensation Theorem”.
1. Reciprocity Theorem is applied for _____ networks.
A. Linear
B. Bilateral
C. Linear bilateral
D. Lumped
Answer: C
Clarification: Reciprocity Theorem is applied for linear bilateral networks, not for linear or for linear bilateral or for lumped networks.
2. Reciprocity Theorem is used to find the change in _______ when the resistance is changed in the circuit.
A. Voltage
B. Voltage or current
C. Current
D. Power
Answer: B
Clarification: Reciprocity Theorem is used to find the change in voltage or current when the resistance is changed in the circuit. If reciprocity theorem is satisfied the ratio of response to excitation is same for the two conditions.
3. Find the current through 3Ω resistor in the circuit shown below.
A. 1
B. 2
C. 3
D. 4
Answer: A
Clarification: Total resistance in the circuit = 2+[3||(2+2||2)] = 3.5Ω. The total current drawn by the circuit =10/(4+6||3) = 1.67A. Current through 3Ω resistor = 1.11A ≅1A.
4. Determine the current flowing in the ammeter having 1Ω internal resistance connected in series with the 3Ω resistor as shown in the below circuit.
A. 0.91
B. 0.92
C. 0.93
D. 0.94
Clarification: Current through 3Ω resistor = 1.11A. So voltage drop across 1Ω resistor = 1.11×1 = 1.11V. Now the circuit can be modified as
Now current through 3Ω resistor = 0.17A. This current is opposite to the current calculated before. So ammeter reading = (1.11-0.17) = 0.94A.
5. Find the current through 6Ω resistor in the circuit shown below.
A. 0.33
B. 0.44
C. 0.55
D. 0.66
Answer: C
Clarification: Total resistance in the circuit = 4+6||3Ω. The total current drawn by the circuit = 10/(4+6||3)=1.67A. Current through 6Ω resistor = 0.55A.
6. Determine the current flowing in the ammeter having 1Ω internal resistance connected in series with the 6Ω resistor as shown in the below circuit.
A. 0.4
B. 0.45
C. 0.9
D. 0.95
Clarification: Current through 3Ω resistor = 0.55A. So voltage drop across 1Ω resistor = 0.55×1 = 0.55V.
Now the circuit can be modified as
Now current through 6Ω resistor = 0.094A. This current is opposite to the current calculated before. So ammeter reading = (0.55-0.0.94) = 0.45A.
7. Find the current through 6Ω resistor in the circuit shown below.
A. 0.11
B. 0.22
C. 0.33
D. 0.44
Answer: C
Clarification: Total current in the circuit = 10/(4+3||2||6)=2A. Current through 6Ω resistor = 2×(3||2)/(6+3||2)=0.33A.
8. Consider the following circuit. Determine the current flowing in the ammeter having 1Ω internal resistance in series with the 6Ω resistor.
A. 0.1
B. 0.2
C. 0.3
D. 0.4
Clarification:
New total current = 0.33/(7+4||2||3)=0.04A. Now reading of ammeter = 0.33-0.04=0.29A ≅ 0.3A.
9. Find the current through 3Ω resistor in the circuit shown below.
A. 0.45
B. 0.56
C. 0.67
D. 0.78
Answer: C
Clarification: Total current = 10 / (4 + (6||2||3) = 2A. Current through 3Ω resistor= 2 x (6||2)/(3 + (6||2)) = 0.67A.
10. Consider the following circuit. Determine the current flowing in the ammeter having 1Ω internal resistance in series with the 3Ω resistor.
A. 0.6
B. 0.7
C. 0.8
D. 0.9
Clarification: The current flowing in the ammeter having 1Ω internal resistance in series with the 3Ω resistor shown in the circuit is 0.6 A.
Current through 3Ω resistor = 0.67/(7 + (4||6||2)) = 0.08A. Ammeter reading = 0.67 – 0.08 = 0.59 ≅ 0.6A.