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How does an ammeter load a circut? Explaun it with an example

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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

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1 answer 10 views

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 

asked May 13, 2018 in Network Analysis by Shimroz123
1 answer 30 views

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

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
1 answer 29 views

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

asked Apr 29, 2018 in Network Analysis by Shimroz123
1 answer 38 views

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

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
0 answers 14 views

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

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
0 answers 15 views

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

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
0 answers 17 views

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

asked Apr 5, 2018 in Electrical Engineering by Zeeshan
1 answer 12 views

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

asked Mar 31, 2018 in Electrical Engineering by Shimroz123
1 answer 7 views

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

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
1 answer 12 views

Which topology is used for a central Network controller

asked May 14, 2018 in Electrical Engineering by Shimroz123
1 answer 73 views

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

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
0 answers 18 views

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

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
1 answer 26 views

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

asked May 20, 2018 in Network Analysis by Shimroz123
1 answer 15 views

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.

asked May 17, 2018 in Electronics communication by Shimroz123
1 answer 19 views

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

asked Apr 29, 2018 in Network Analysis by Shimroz123
0 answers 15 views

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

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
0 answers 22 views

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

asked Apr 9, 2018 in Electronics Engineering by Shimroz123
1 answer 516 views

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

asked May 18, 2018 in Induction Machine by Shimroz123
1 answer 24 views

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

asked Apr 11, 2018 in Electrical Engineering by Shimroz123
0 answers 22 views

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

asked Apr 10, 2018 in Electrical Engineering by Shimroz123
0 answers 18 views

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 

asked Apr 10, 2018 in Electrical Engineering by Shimroz123
1 answer 15 views

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

asked Apr 9, 2018 in Electrical Engineering by Shimroz123
1 answer 14 views

 ____ 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.

asked May 13, 2018 in Computer Engineering by Shimroz123
1 answer 15 views

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.

asked Apr 28, 2018 in Network Analysis by Shimroz123
1 answer 22 views

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

asked Apr 11, 2018 in Computer Engineering by Shimroz123
1 answer 9 views

A passive network is one which contains?

asked Mar 25, 2018 in Network Analysis by Shimroz123
2 answers 31 views

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

asked Mar 25, 2018 in Network Analysis by Shimroz123
0 answers 94 views
0 answers 82 views
1 answer 51 views

 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 

asked Jun 18, 2018 in Electrical Engineering by Shimroz123
1 answer 21 views

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

asked Apr 29, 2018 in Electrical Engineering by Shimroz123
1 answer 10 views

A passive network

asked Apr 26, 2018 in Electrical Engineering by Shimroz123
1 answer 10 views

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.

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
1 answer 11 views

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

asked Apr 25, 2018 in Electrical Engineering by Shimroz123
1 answer 19 views

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

asked Apr 23, 2018 in Electrical Engineering by Shimroz123
1 answer 12 views

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.

asked Apr 23, 2018 in Electrical Engineering by Zeeshan
0 answers 17 views

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

asked Apr 14, 2018 in Electrical Engineering by Shimroz123
1 answer 60 views

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 

asked Apr 10, 2018 in Electrical Engineering by Shimroz123
0 answers 37 views

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 

asked Apr 10, 2018 in Electrical Engineering by Shimroz123
0 answers 14 views

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

asked Apr 9, 2018 in Electrical Engineering by Shimroz123
0 answers 17 views

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 

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
0 answers 21 views

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 

asked Apr 5, 2018 in Electrical Engineering by Shimroz123
0 answers 66 views

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

asked Mar 31, 2018 in Electrical Engineering by Shimroz123
0 answers 16 views

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

asked Mar 31, 2018 in Electrical Engineering by Shimroz123
1 answer 10 views

Write any two factors on which earth resistance depends.

asked Sep 6, 2018 by Shimroz123
1 answer 15 views

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

asked Sep 5, 2018 by Shimroz123
1 answer 74 views

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.

asked Sep 2, 2018 by Shimroz123
1 answer 14 views

 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 

asked Jun 17, 2018 in Electronics Engineering by Shimroz123

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