27 real Network Theory questions from the ECE 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 Kirchhoff's current law?
Junior
A.algebraic sum of currents meeting at any node is zero because charge cannot accumulate at a junction
B.transmission parameters relating sending-end voltage and current to receiving-end values, with AD − BC = 1 for a reciprocal network and A = D for a symmetrical one
C.any linear two-terminal network is replaceable by one voltage source in series with the resistance seen with all sources deactivated
D.response in a linear circuit with several independent sources equals the sum of responses with each source acting alone and the others replaced by their internal impedances
A.Kirchhoff's current law — in a linear passive bilateral network the ratio of response to excitation is unchanged when the positions of source and measuring point are interchanged
B.Kirchhoff's current law — any linear two-terminal network is replaceable by one voltage source in series with the resistance seen with all sources deactivated
C.Kirchhoff's current law — transmission parameters relating sending-end voltage and current to receiving-end values, with AD − BC = 1 for a reciprocal network and A = D for a symmetrical one
D.Kirchhoff's current law — algebraic sum of currents meeting at any node is zero because charge cannot accumulate at a junction
A.sum of the products of branch voltages and branch currents over all branches is zero for any network satisfying Kirchhoff's laws, whatever the element types
B.in a linear passive bilateral network the ratio of response to excitation is unchanged when the positions of source and measuring point are interchanged
C.any linear two-terminal network is replaceable by one voltage source in series with the resistance seen with all sources deactivated
D.response in a linear circuit with several independent sources equals the sum of responses with each source acting alone and the others replaced by their internal impedances
5. Which term means: "any linear two-terminal network is replaceable by one voltage source in series with the resistance seen with all sources deactivated"?
A.Thevenin's theorem — in a linear passive bilateral network the ratio of response to excitation is unchanged when the positions of source and measuring point are interchanged
B.Thevenin's theorem — response in a linear circuit with several independent sources equals the sum of responses with each source acting alone and the others replaced by their internal impedances
C.Thevenin's theorem — any linear two-terminal network is replaceable by one voltage source in series with the resistance seen with all sources deactivated
D.Thevenin's theorem — product R·C, the time for a charging capacitor to reach 63.2% of its final voltage, with the circuit treated as settled after about five such intervals
A.algebraic sum of currents meeting at any node is zero because charge cannot accumulate at a junction
B.sum of the products of branch voltages and branch currents over all branches is zero for any network satisfying Kirchhoff's laws, whatever the element types
C.correspondence in which series maps to parallel, R to G, L to C and KVL to KCL, so mesh equations of one circuit are the node equations of its dual
D.a resistive load draws the most power when it equals the source resistance, at which point efficiency is only 50%
A.Maximum power transfer theorem — sum of the products of branch voltages and branch currents over all branches is zero for any network satisfying Kirchhoff's laws, whatever the element types
B.Maximum power transfer theorem — a resistive load draws the most power when it equals the source resistance, at which point efficiency is only 50%
C.Maximum power transfer theorem — any linear two-terminal network is replaceable by one voltage source in series with the resistance seen with all sources deactivated
D.Maximum power transfer theorem — algebraic sum of currents meeting at any node is zero because charge cannot accumulate at a junction
A.response in a linear circuit with several independent sources equals the sum of responses with each source acting alone and the others replaced by their internal impedances
B.algebraic sum of currents meeting at any node is zero because charge cannot accumulate at a junction
C.correspondence in which series maps to parallel, R to G, L to C and KVL to KCL, so mesh equations of one circuit are the node equations of its dual
D.sum of the products of branch voltages and branch currents over all branches is zero for any network satisfying Kirchhoff's laws, whatever the element types
11. Which term means: "response in a linear circuit with several independent sources equals the sum of responses with each source acting alone and the others replaced by their internal impedances"?
A.Superposition theorem — any linear two-terminal network is replaceable by one voltage source in series with the resistance seen with all sources deactivated
B.Superposition theorem — response in a linear circuit with several independent sources equals the sum of responses with each source acting alone and the others replaced by their internal impedances
C.Superposition theorem — in a linear passive bilateral network the ratio of response to excitation is unchanged when the positions of source and measuring point are interchanged
D.Superposition theorem — a resistive load draws the most power when it equals the source resistance, at which point efficiency is only 50%
A.algebraic sum of currents meeting at any node is zero because charge cannot accumulate at a junction
B.a resistive load draws the most power when it equals the source resistance, at which point efficiency is only 50%
C.sum of the products of branch voltages and branch currents over all branches is zero for any network satisfying Kirchhoff's laws, whatever the element types
D.in a linear passive bilateral network the ratio of response to excitation is unchanged when the positions of source and measuring point are interchanged
14. Which term means: "in a linear passive bilateral network the ratio of response to excitation is unchanged when the positions of source and measuring point are interchanged"?
A.Reciprocity theorem — correspondence in which series maps to parallel, R to G, L to C and KVL to KCL, so mesh equations of one circuit are the node equations of its dual
B.Reciprocity theorem — transmission parameters relating sending-end voltage and current to receiving-end values, with AD − BC = 1 for a reciprocal network and A = D for a symmetrical one
C.Reciprocity theorem — in a linear passive bilateral network the ratio of response to excitation is unchanged when the positions of source and measuring point are interchanged
D.Reciprocity theorem — sum of the products of branch voltages and branch currents over all branches is zero for any network satisfying Kirchhoff's laws, whatever the element types
A.a resistive load draws the most power when it equals the source resistance, at which point efficiency is only 50%
B.correspondence in which series maps to parallel, R to G, L to C and KVL to KCL, so mesh equations of one circuit are the node equations of its dual
C.transmission parameters relating sending-end voltage and current to receiving-end values, with AD − BC = 1 for a reciprocal network and A = D for a symmetrical one
D.product R·C, the time for a charging capacitor to reach 63.2% of its final voltage, with the circuit treated as settled after about five such intervals
17. Which term means: "product R·C, the time for a charging capacitor to reach 63.2% of its final voltage, with the circuit treated as settled after about five such intervals"?
A.RC time constant — a resistive load draws the most power when it equals the source resistance, at which point efficiency is only 50%
B.RC time constant — transmission parameters relating sending-end voltage and current to receiving-end values, with AD − BC = 1 for a reciprocal network and A = D for a symmetrical one
C.RC time constant — any linear two-terminal network is replaceable by one voltage source in series with the resistance seen with all sources deactivated
D.RC time constant — product R·C, the time for a charging capacitor to reach 63.2% of its final voltage, with the circuit treated as settled after about five such intervals
A.in a linear passive bilateral network the ratio of response to excitation is unchanged when the positions of source and measuring point are interchanged
B.algebraic sum of currents meeting at any node is zero because charge cannot accumulate at a junction
C.sum of the products of branch voltages and branch currents over all branches is zero for any network satisfying Kirchhoff's laws, whatever the element types
D.transmission parameters relating sending-end voltage and current to receiving-end values, with AD − BC = 1 for a reciprocal network and A = D for a symmetrical one
20. Which term means: "transmission parameters relating sending-end voltage and current to receiving-end values, with AD − BC = 1 for a reciprocal network and A = D for a symmetrical one"?
A.ABCD parameters — transmission parameters relating sending-end voltage and current to receiving-end values, with AD − BC = 1 for a reciprocal network and A = D for a symmetrical one
B.ABCD parameters — a resistive load draws the most power when it equals the source resistance, at which point efficiency is only 50%
C.ABCD parameters — correspondence in which series maps to parallel, R to G, L to C and KVL to KCL, so mesh equations of one circuit are the node equations of its dual
D.ABCD parameters — algebraic sum of currents meeting at any node is zero because charge cannot accumulate at a junction
A.response in a linear circuit with several independent sources equals the sum of responses with each source acting alone and the others replaced by their internal impedances
B.any linear two-terminal network is replaceable by one voltage source in series with the resistance seen with all sources deactivated
C.algebraic sum of currents meeting at any node is zero because charge cannot accumulate at a junction
D.sum of the products of branch voltages and branch currents over all branches is zero for any network satisfying Kirchhoff's laws, whatever the element types
23. Which term means: "sum of the products of branch voltages and branch currents over all branches is zero for any network satisfying Kirchhoff's laws, whatever the element types"?
A.Tellegen's theorem — in a linear passive bilateral network the ratio of response to excitation is unchanged when the positions of source and measuring point are interchanged
B.Tellegen's theorem — algebraic sum of currents meeting at any node is zero because charge cannot accumulate at a junction
C.Tellegen's theorem — sum of the products of branch voltages and branch currents over all branches is zero for any network satisfying Kirchhoff's laws, whatever the element types
D.Tellegen's theorem — product R·C, the time for a charging capacitor to reach 63.2% of its final voltage, with the circuit treated as settled after about five such intervals
A.a resistive load draws the most power when it equals the source resistance, at which point efficiency is only 50%
B.algebraic sum of currents meeting at any node is zero because charge cannot accumulate at a junction
C.correspondence in which series maps to parallel, R to G, L to C and KVL to KCL, so mesh equations of one circuit are the node equations of its dual
D.product R·C, the time for a charging capacitor to reach 63.2% of its final voltage, with the circuit treated as settled after about five such intervals
26. Which term means: "correspondence in which series maps to parallel, R to G, L to C and KVL to KCL, so mesh equations of one circuit are the node equations of its dual"?
A.Duality in networks — sum of the products of branch voltages and branch currents over all branches is zero for any network satisfying Kirchhoff's laws, whatever the element types
B.Duality in networks — product R·C, the time for a charging capacitor to reach 63.2% of its final voltage, with the circuit treated as settled after about five such intervals
C.Duality in networks — correspondence in which series maps to parallel, R to G, L to C and KVL to KCL, so mesh equations of one circuit are the node equations of its dual
D.Duality in networks — in a linear passive bilateral network the ratio of response to excitation is unchanged when the positions of source and measuring point are interchanged
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