27 real Circuit Theory & Networks questions from the Electrical Core bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.
1. What is Ohm's law?
Junior
A.current through a conductor is directly proportional to the voltage across it at constant temperature, the constant being resistance
B.in a linear circuit with several independent sources, the total response equals the sum of responses to each source acting alone
C.the algebraic sum of currents entering any node is zero, a direct consequence of conservation of charge
D.any linear two-terminal network can be replaced by a single voltage source in series with an equivalent resistance
2. Which term means: "current through a conductor is directly proportional to the voltage across it at constant temperature, the constant being resistance"?
A.Kirchhoff's current law — any linear two-terminal network can be replaced by a single current source in parallel with an equivalent resistance
B.Kirchhoff's current law — any linear two-terminal network can be replaced by a single voltage source in series with an equivalent resistance
C.Kirchhoff's current law — the algebraic sum of currents entering any node is zero, a direct consequence of conservation of charge
D.Kirchhoff's current law — a load receives maximum power when its impedance equals the complex conjugate of the source impedance, at only 50% efficiency
A.Kirchhoff's voltage law — condition where inductive and capacitive reactances cancel, so impedance is minimum and purely resistive and current is maximum
B.Kirchhoff's voltage law — the algebraic sum of voltages around any closed loop is zero, a direct consequence of conservation of energy
C.Kirchhoff's voltage law — the algebraic sum of currents entering any node is zero, a direct consequence of conservation of charge
D.Kirchhoff's voltage law — current through a conductor is directly proportional to the voltage across it at constant temperature, the constant being resistance
A.Maximum power transfer theorem — the algebraic sum of voltages around any closed loop is zero, a direct consequence of conservation of energy
B.Maximum power transfer theorem — in a linear circuit with several independent sources, the total response equals the sum of responses to each source acting alone
C.Maximum power transfer theorem — the algebraic sum of currents entering any node is zero, a direct consequence of conservation of charge
D.Maximum power transfer theorem — a load receives maximum power when its impedance equals the complex conjugate of the source impedance, at only 50% efficiency
20. Which term means: "in a linear circuit with several independent sources, the total response equals the sum of responses to each source acting alone"?
A.Superposition theorem — in a linear circuit with several independent sources, the total response equals the sum of responses to each source acting alone
B.Superposition theorem — the algebraic sum of voltages around any closed loop is zero, a direct consequence of conservation of energy
C.Superposition theorem — ratio of resonant frequency to bandwidth, equal to omega·L/R for a series RLC circuit, indicating selectivity of the circuit
D.Superposition theorem — current through a conductor is directly proportional to the voltage across it at constant temperature, the constant being resistance
23. Which term means: "condition where inductive and capacitive reactances cancel, so impedance is minimum and purely resistive and current is maximum"?
A.Series RLC resonance — any linear two-terminal network can be replaced by a single current source in parallel with an equivalent resistance
B.Series RLC resonance — current through a conductor is directly proportional to the voltage across it at constant temperature, the constant being resistance
C.Series RLC resonance — condition where inductive and capacitive reactances cancel, so impedance is minimum and purely resistive and current is maximum
D.Series RLC resonance — a load receives maximum power when its impedance equals the complex conjugate of the source impedance, at only 50% efficiency
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