"In a R-L series circuit, applied voltage is in phase with the total current."  True  False   "In series-connected ac circuit, the total voltage across the circuit and the voltage across each elements are the same."  True  False   "In parallel-connected ac circuit, the total voltage across the circuit is always equal to the phasor sum of the individual voltage across each element."  True  False

Q: QUESTION TWO Power transformers are used in the power system to change the voltage levels to a level…

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Q: In a star connected system, the three phase currents are mutually displaced by 120 degree. Select…

A: In star connected systems each phase is differ by 120 degrees apart. Ex: Phase A current : Ia= Ia at…

Q: Across what direct emf must an impedance coil having a resistance of 20 ohms and an inductance of…

A: given parameters are as follows.

Q: In a 390V, 57 Hz, three phase system, the value of the reactive power without capacitor bank is…

A: Given in the question: The system voltage is: V = 390V The system frequency is, F = 57Hz The…

Q: circuit breaker

A: Circuit Breaker  A circuit breaker is basically an electrical switch that opens when there is an…

Q: Star circuit to three-phase variable power supply. Set the resistors to a value of 300 Ω and the…

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Q: 12. The resultant voltage of more than one EMF connected 'in-series' depends on the values of the…

A: The resultant voltage of more than one emf connected in series depends on the values of the…

Q: Law (KVL) states that in any given electric network, the phasor sum of the voltage rises and voltage…

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Q: A-Give the answer of the following: 1. what functions are performed by instrument transformers. 2.…

A: (1) Consider the function performed by the instrument transformer as follows:

Q: SHOW COMPLETE SOLUTION! ASAP!! two single-phase transformers are connected open-delta and deliver a…

A: Transformer: It is a static device and is used to step up and step down the voltage level while…

Q: Power transformers are used in the power system to change the voltage levels to a level suitable for…

A: We are authorized to answer three subparts at a time. Since you have not mentioned which part you…

Q: For the same alternator, the ratio of rated KVA, when connected as 3-phase winding alternator to…

A: During the 3-phase connection, the value of the phase spread will be ϕ=π3 Thus, the value of the…

Q: Compute the angle of the voltage in units of degrees (enter value only, not units) for a componet…

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Q: Discussion 1- Explain why the phasor and the impedance have the same angle. 2- At what condition the…

A: 1. the phasor and impedance have same angle

Q: Define three cases on which real and reactive power flow gets affected. Draw the phasor diagrams of…

A: The three cases on which real and reactive power flow gets affected are as following,   CASE-1 When…

Q: Two 1-phase transformers A and B rated at 250 kVA each are operated in parallel on both sides.…

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Q: 3. In a R-C parallel circuit, total current is out of phase with the applied voltage. True False

A: As per company policy we supposed to answer only 1st question. Rest question upload separately.

Q: Problem 2 - A 1000 – MVA, 20 – kV, 60 – Hzthree-phase generator is connected through a 1000 – MVA,…

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Q: single phase circuit has an apparent power of 5 kVA and a reactive power of 4 kVAr. Then find (i)…

A: We need to find out power factor and active power and resistor for given apparent power

Q: equivalent winding (a) resistance,(b) reactance and (c) impedance referred to the high voltage side.

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Q: In three phase power measurement, current coil is connected in series and potential coil is…

A: In three phase power measurement (wattmeter) consists of a current coil connected in series with…

Q: Draw a phasor diagram that shows VS, I, VR, and VL 5. Does the current lag, lead, or in-phase with…

A: In this question we need to draw a phase diagram , find current is leading or lagging and verify KVL

Q: For the same alternator, the ratio of rated KVA, when connected as 3-phase winding alternator to…

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Q: In a 3-phase overhead system. each hne is suspended by a string of 3 insulators. The voltage across…

A: Given,  A 3-ph overhead transmission line has, Number of insulator= 3 Voltage across the top unit…

Q: Three impedances Z, -1-j4 ohms, Z2 - -j6 ohms and Z, 4 j3 ohms are connected in series- parallel. Z,…

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Q: 1. (a) Which parameter is the most important in case of determining the rating of a circuit breaker…

A: (a)  In a power system, the rating of a circuit breaker is usually defined by its capacity to handle…

Q: For performing dielectric-strength tests on insulating materials, two transformers are connected in…

A: Dielectric strength test is one of tje important tests to be performed on transformer. In this test…

Q: The rating of generator is expressed in terms of kVA      Select one: True False

A: The rating of generator is in Apparent power kVA.because the power factor is varied for different…

Q: 2) Show the terms phase voltage, phase current, line voltage and line current on delta and star…

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Q: In a 66 KV system the phase is ground capacitance is 0.05 µF and inductance is 2H. The voltage (kV)…

A: Given a 66 kV system with, Capacitance, C=0.05 μF Inductance,k L=2 H Current that be interrupted,…

Q: In a R-C parallel circuit, total current is out of phase with the applied voltage."  True  False…

A: Question 1 & question 2 both are same

Q: A load impedance of (200+j0) ohm is to be matched with a 50 ohm transmission line using a quarter…

A: Quarter wave transformer is an impedance matching device and it resides between the transmission…

Q: what are the advantages and Disadvantages Connecting transformers 3 Phase between (delta to Star)

A: Star to delta connection. In this connection, the start connection is at the primary side and the…

Q: The units of admittance, conductance, and susceptance are siemens. (a) True

A: Since, The admittance is the reciprocal of the impedance and it is denoted by Siemens(S). The…

Q: True or False The zero sequence components consist of 3 equal sized phasors. The phase difference…

A: The zero sequence components consist of 3 equal sized phasors. The phase difference between the…

Q: Two single-phase transformers in parallel supply a load of 500 A at 0.8 pf lagging and at 400 V.…

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Q: The current from neutral to ground connection is 12 A. Calculate the zero phase sequence components…

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Q: The avg. power in 1-phase ac circuit with the pure inductive load for the ac circuit.

A: For the inductive circuit, the instantaneous circuit is given as:

Q: Two single-phase transformers, having equal turns ratio, in parallel supply a secondary load of…

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Q: For the circuit of Figure 1 calculate the complex impedance.

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Q: 36. The essential condition for parallel opearation of two 1- transformers is that they should have…

A: In this question,  We need to choose the correct options What is the essential condition for the…

Q: Problem 2 - A 1000 – MVA, 20 – kV, 60 – Hzthree-phase generator is connected through a 1000 - MVA,…

A: No load voltage Eg = 1 pu Xd'' =0.15 Xd'=0.3 Xd=1.4

Q: In three phase power measurement, current coil is connected in series and potential coil is…

A: We know that  Electrical power is measured with a wattmeter. A wattmeter consists of a current coil…

Q: In 3-phase balanced delta connected system, the voltage induced in each coil is called

A: In a delta-connected system, if the finished terminal of one winding is connected to the beginning…

Q: What will happen in each of these systems to the phase voltages of the load, if one of the source…

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Q: Calculate the total power factor,

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Q: 10. In a R-L series circuit, total current lags behind the applied voltage. True False 11. In…

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Q: 11. A three-phase delta-delta connected transformer consists of three single-phase units each rated…

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Q: A parallel connection of a RL branch with a C branch is connected across a 100V AC mains. At first R…

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