# Which two network theorems exhibit duality ?

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Which two network theorems exhibit duality ? (A) Superposition theorem and Thevenin's theorem (B) Super position theorem and Norton's theorem (C) Thevenin's theorem and Norton's theorem (D) Norton's theorem and Milliman's theorem

## Related questions

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Which of the following theorems can be applied to any network linear or non-linear, active or passive, time variant or time invariant?   (a) Thevenin Theorem (b) Norton Theorem (c) Telligen Theorem (d) Superposition Theorem

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Consider the following statements :  1. Network theorems are not derivable from Kirchhoff's law.  2. To get the . Norton current, one has to short the current source.  3. Thevenin's theorem is suitable for a circuit involving voltage sources and series connections.  Which of the above statements is/are correct ?  (a) 1, 2 and 3 (b) 1 only (c) 2 only (d) 3 only

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Which of the following theorems enables a number of voltage (or current) source to be combined directly into a single voltage (or current) source. (1) compensation theorem (2) reciprocity theorem (3) superposition theorem (4) Millman's theorem

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For a two -port reciprocal network, the three transmission parameters are A = 4, B = 7 and C = 5. What is the value of D ?  (a) 9.5 (b) 9.0 (c) 8.5 (d) 8.0

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The two corner frequencies of the lead network are : (A) Less than the gain crossover frequency (B) More than the gain crossover frequency (C) On both the sides of the gain crossover frequency (D) Any of the above

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For a two port network to be reciprocal:  (A) Z11= Z22 (B) Y21 = Y21 (C) h21 = h22 (D) AD-BC = 0

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For a two port symmetric bilateral network, if A= 3Ω and B = 1Ω, the value of parameter C will be  (A) 4s (B) 6s (C) 8s (D) 16s

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A Two-Port Network is said to be symmetrical when the following equalities hold good (A) Z11 = Z22 and Z12 = Z21 (B) Z11 = Z22 (C) Y12 = Y21 (D) Y11 = Y22 and Y12 = Y21

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Consider the following statements :  1. Superconductors exhibit normal conductivity behaviour above a transition temperature Tc.  2. Superconductors lose their superconducting nature in an external magnetic field, provided the external magnetic field is above a critical value.  3. High Tc superconductors have Tc values in the range 1 to 10 K.  Which of the above statements are correct ? (a) 1 and 2 only (b) 1 and 3 only (c) 2 and 3 only (d) 1, 2 and 3

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Which topology is used for a central Network controller

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Which of the following are satisfied in a non-linear network ?  1. Associative  2. Superposition  3. Homogeneity  4. Bilaterality  Select the correct answer using the codes given below :  (a) 1 and 3 only (b) 1 and 4 only (c) 2 and 3 only (d) 2 and 4 only

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Which among the following is the equation for the number of independent loops for a network with n nodes and b branches?  (A) n-1 (B) b+n-1 (C) b-n+1 (D) b-n

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A passive two port network is in a steady state. Compared to its input, the steady state output can never offer  A) Higher voltage B) Lower impedance C) Greater power D) Better regulation

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A two port network having a 6 dB loss will give  (A) an output power which is one - quarter of the input power (B) an output power which is one - half of the input power (C) an output voltage which is 0.707 of the input voltage. (D) an output power which is 0.707 of the input power.

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Two port networks are connected in cascade. The parameters of the network are obtained by multiplying in individual

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For a two port network, with output shorted, V1=25V, I1=1 A,I2=2A. With input open circuited, V1=10 V,V2= 50 V,I2= 2 A. h12 and h21 are  A) 0.2 and 25 B) 25 and 0.2 C) 0.4 and 2 D) 0.2 and 2

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Condition for reciprocity and symmetry of a two port network are respectively  A) Z11=Z22 and Z12=Z21 B) Z11=Z12 and Z22=Z21 C) Z12=Z21 and Z11=Z22 D) Z22=Z21 and Z22=Z12

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A single-phase induction motor with only the main winding excited would exhibit the following response at synchronous speed  (A) Rotor current is zero (B) Rotor current is non-zero and is at slip frequency (C) Forward and backward rotating fields are equal (D) Forward rotating field is more than the backward rotating field

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Which two values are plotted on a B-H curve graph : -  a) reluctance and flux density b) permeability and reluctance c) magnetizing force and permeability d) flux density and magnetizing force

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The distance between two coil sides which are connected to the same commutator segment is called as  (1) winding pitch (2) back pitch (3) front pitch (4) full pitch

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Which of the following test is carried out to ensure the sufficient strength of insulation between two or more conductors to avoid leakage between them ?   (a) Testing of insulation resistance between wiring and earth (b) Testing of insulation resistance between conductors (c) Testing of polarity of single phase switch (d) Testing of earth continuity path

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Which of the statements about the force between two charge is true?  (1) Unlike charges repel each other (2) Like charges attract each other (3) No force exists between two unlike charges (4) A force of repulsion exists between two like charges

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____ is known as a computer network in which one centralized, powerful computer is a hub to which many less powerful personal computers or workstations are connected. The clients run programs and access data that stored on the server.  a) Client-Server network b) Extranet c) Internet d) None of the above.

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Which of the following are known as the short circuit parameters of a 2- port network? (A) Z- parameters. (B) H- parameters. (C) Y- parameters. (D) A,B,C,D, parameters.

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Which layer functions as a liaison between user support layers and network support layers?  A) Network layer B) Physical layer C) Transport layer D) Session layer

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A passive network is one which contains?

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A network which contains one or more than one source of e.m.f. is known as?

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The number of loop equations required to completely analysing a network comprising of 8 independent branches and 6 nodes including the reference node shall be A) 3 B) 2 C) 4 D) 5

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A network that consists of at least a voltage source or current source is called A) Active network B) Ideal network C) Sourced network D) Outsourced network

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A passive network

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A network consists of several inductances connected in parallel. The equivalent inductance of the network is given by (A) the sum of the individual inductances. (B) the reciprocal of the sum of the individual inductances. (C) the sum of the reciprocals of individual inductances. (D) the reciprocal of the sum of reciprocals of individual inductances.

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The three non -inductive loads of 5 kW, 3 kW and 2 kW are connected in a star network between R, Y and B phases and neutral. The line voltage is 400 V. The current in the neutral wire is nearly (a) 11 A (b) 14 A (c) 17 A (d) 21 A

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In the first Cauer network, with a pole at infinity, the first element must be

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In any network the current will be seen to be consisting of a forced current and a natural current. A forced current is  (a) A steady-state current with external source but a natural current is a transient current in a closed circuit with no external source. (b) A transient current with external source but a ... an external source. (d) A transient current in a closed circuit without external source, while a natural current is a steady-state current with an external source.

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A binary ladder with R -2R network has R = 20K Ohms. The total resistance looking out toward the LSB input is (a) 20KOhms (b) 40KOhms (c) 10KOhms (d) 30KOhms

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A network has 10 nodes and 17 branches. The number of independent mesh equations required to solve the network is   (a) 7 (b) 8 (c) 10 (d) 45

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In an n-bus power system, considering n-nodes network, the size of ybus is   (a) (n – 1) × (n – 1) (b) (n + 1) × (n + 1) (c) n × n (d) 2n × 2n

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A network contains linear resistors and ideal voltage sources. If values of all the resistors are doubled, then voltage across each resistor is  A) Halved B) Doubled C) Increases by 4 times D) Remains the same

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What is the equivalent resistance of a network having 5 resistors of each 10ohm connected in parallel?  (A) 10 Ohms (B) 50 Ohms (C) 500 Ohms (D) 2 Ohms

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Norton's Theorem is a way to reduce a network to  (A) An equivalent circuit composed of a single current source, series resistance, and series load (B) An equivalent circuit composed of a single voltage source, parallel resistance, and parallel load (C) An equivalent circuit composed of a single voltage source, series resistance, and series load (D) An equivalent circuit composed of a single current source, parallel resistance, and parallel load

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In a network containing resistances and reactances the roots of the characteristic equation give for the circuit : (A) The forced response (B) The total response (C) The natural response (D) The damped response

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Thevenin’s theorem can be applied to network containing : (A) Passive elements only (B) Active elements only (C) Linear elements only (D) All of these

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Write any two factors on which earth resistance depends.

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List two types of oscillator, which generates frequency in RF range.

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Give broad classification of maintenance with meaning of each type. State the factors on which ideal maintenance of electric rolling stock is judged. Give any two means to improve any one factor of these.

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In thermo-couple instruments, in which of the following is an emf caused if the junction of two wires of dissimilar metals is heated and the free or cold ends are connected to a milli-voltmeter? A) Kelvin effect B) Hot wire effect C) Seebeck effect D) Faraday effect