Answer / ujwala

industrial frantically machines/items:
counter-weight elevator water wheel

commerce/realistically trade:
balacne scale

weapons and war machines:
catapults ballista trebuchet crossbow fire-siphon

rich people's toys:
music box

expressly cutting edge devices:
music box (again)

while doing the excitation current test on power transformer what is the value of voltage to be applied? Nomonal rated voltage or 10% of rated voltage? Is it necessary to apply on high voltage side?

1 Answers   ACC,

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if reactive power become zero in transmission system then what effect on system.???

3 Answers   Sedemac,

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if earthing is not connected to computers any problem ?

2 Answers   HP,

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How many types of DC current

2 Answers  

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what is power factor in ac ckt ?

5 Answers  

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low voltage distribution is done by a)3 phase 3 wire b)3 phase 4 wire c)single phase

3 Answers  

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Define steady state error.

0 Answers  

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why D.C excitation is given to sunchronous motor?

6 Answers  

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while starting a liquid starter ,is there any volage drop on water/soda on tank.can we touch the tank on starting?

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When a square wave is applied to primary of a transformer then what will be output wave form of secondary ?

15 Answers   Bhel, Sail, Sterling Telecom, TCS,

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why transformer rating in kva

6 Answers  

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How can a transformer test by megger?

1 Answers   Bosch,

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