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Recent questions tagged electrical

explain the functions of each block of solar system

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What are the test and measuring instrument required in an Electrical depots?
Answer : Ans. Following are the test and measuring instruments required in an Electrical depots. a. Test lamp b. Line Tester c. Continuity tester d. Volt meter e. Ammeter f. Earth megger g. Megger h. Lux meter i. Power analyzer j. Infrared thermometer...

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In a two-wattmeter method of power measurement, the readings of two wattmeters are equal when power factor is

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What are the five important of terminals

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The input power to a 220 V lap wound shunt D.C motor runs is 11 kW , the speed is 1150 rpm takes 5 A at no load ,shunt field resistance is 110 Ω and armature resistance is 0.5 Ω ... current .assume the information in branch a is normal condition.c-Maximum efficiency before and after adding (R add).

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220kV three phase transmission line is 60 km long. The resistance is 15 Ohms per phase and the inductance is j 30 Ohms. 1- Calculate : voltage regulation, TL line power losses and efficiency when ... for 0.85, calculate zise of the required capacitor  and the same parameters which were in part 1

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Is it possible to apply superposition theorem to nonlinear circuit? If yes, why? and if no, why? Explain

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How to replace the electrical wiring in the apartment?
Answer : How to replace the electrical wiring in the apartment? In most cases, when renovating an apartment, a complete replacement of the electrical wiring is required, especially if the house was built in ... Upon completion of the finishing, the new electrical wiring in your apartment is ready for use....

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V1=?? V2=?? V3=?? 

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Explain by use of a well labeled diagram distribution line protection coordination landmarks

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Refer to the circuit below. The total absorbed (consumed) power is:

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A battery of e.m.f. 12V supplies a current of 5A for 2 minutes. How much energy is supplied in this time?

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الرجوع إلى الدائرة أدناه. الطاقة التي يستهلكها العنصر E متساوية.
Answer : The power consumed the element E is equal to the  : P = V x I = 6V x 1 A = 6 W...

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Refer to the circuit below. The voltage V2, is equal to:
Answer : The answer to this question is -3V. Because 3V is in parallel with v2 and voltages in parallel are equal. But it is in opposite direction so the answer is -3V. ...

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Briefly explain how an electrical generator converts mechanical energy into electrical energy.
Answer : Working principle of DC generator: * Working principle of DC generator is the principle of dynamically induced emf or electromagnetic induction. * According to this principle, when flux is cut by a conductor, an ... , the flux is cut by the armature winding and an emf is dynamically induced in it. ...

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Briefly explain how the power factor of an inductive circuit can be improved.
Answer : As we know that power factor should be corrected to ensure that the current supplied is cost friendly. Meaning the power factor should be around one but not greater than one(0.8-0.9) in a ... an inductive circuit due to the inductive reactance which oppose the change of current in the ac circuit. ...

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Explain the suitability of aluminium as an electrical conductor with respect to its mechanical and electrical properties. 
Answer : Following are requirements of conductor:- i) High conductivity :  Material should have high conductivity, So that * cross section of conductor (size) reduces, * Copper losses reduces, * So Efficiency ... . Boiling point is 1820°C 9. Specific gravity is 2.7 10. High resistance to corrosion. ...

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State different types of electrical signal and draw all types of waveforms.
Answer : Types of electrical signals 1) Sine wave 2) Triangular wave 3) Square wave Waveforms ...

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Explain the need of maintenance of electrical equipment.

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