what is the difference between active power and reactive power and apparant power in practical as well as theoritical

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What is the polarization index value ? (Pi value)and simple definition of polarization index ?

0 Answers  

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The speed of a dc motor can be controlled by the variation of 1. armature voltage. 2. field current. 3. armature circuit resistance. 4. angle of brush shift. Which of the statements given above are correct? (a) 1,2 and 3 (b) 2,3 and 4 (c) 1,3 and 4 (d) 1,2 and 4

1 Answers  

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how to calculate relay rating for 50kw load

1 Answers   JNU,

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Why two nos. un-tensioned wires are placed inside the PSC poles used by powergrid in RGGVY works.

2 Answers   Bhel, Power Grid,

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54 Comments Alok and Bhanu play the following min-max game. Given the expression N = 38 + X*(Y – Z) where X, Y and Z are variables representing single digits (0 to 9), Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be?

0 Answers   Bajaj, TCS,

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Why short circuit calculation is not required in LT cable sizing and requiredin HT cable sizing only

2 Answers   Chemtex,

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Which of the following statements is incorrect?(a) 1N = 1 kgm/s2(b) 1V = 1 J/C(c) 30mA = 0.03A(d) 1 J = 1N/m

1 Answers  

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What is the armature mmf in a D.C machine?

0 Answers   HPCL,

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in a dc shunt motor what happens if motor takes high current,no speed

2 Answers  

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I need to calculate the Battery bank back up for below configuration:- UPS - 120 KVA Battery Bank - 200Ah Volt of each cell - 12 V Total No of cell - 34 No's Can you please help me to get the battery back up time for above configuration...? along with formula

1 Answers   Wipro,

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does magnetic interlocking take place in an induction motor ?

2 Answers  

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