In DC while we mention the voltage we are using -48V but in case of AC we mention only 230V not -230V, why we using -48V not 48V

2 Answers  

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In Transmission System if the potential difference at the two end of line are same then is the transmission of power will continue ? if yes then how.

1 Answers   IOCL,

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What are the role of each components in PID COntroller

1 Answers   BARC,

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why circuit breaker closing time is always higher then tripping / opening time.

13 Answers   United Phosphorus,

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Sir,I have finished my B.E in the Stream of EEE.How Can I get C license for Electrical???Please Tell me the way...My mail ID is praba1003105@gmail.com Cell:7402474123

1 Answers  

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what are protective device needed to power a 360W ,50hz,240v,single phase,0.65 pf universal motor

1 Answers   L&T,

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tell me about sf6 breakers

4 Answers  

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Differance between power circuit and control circuit

3 Answers  

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one kva is equal to how much amps?

14 Answers  

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how did the differential relay work to protect the power transformer

4 Answers  

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what is the diffrence between voltage and current?

11 Answers  

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what is the minning of propotional, integral, derivative ?

1 Answers  

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