Why dont we get shock while testing for voltage with a line tester? How the bulb inside the tester glows while testing with tester coz we are totaly isolated from earth or we are not giving close path for the current to flow?

3 Answers  

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Why the brushes used in dc machines are made of carbon not from other metal?

2 Answers  

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At what voltage domestic tubelight works?

2 Answers   Cigfil, L&T, MNC,

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What is the rating of HT SUBSTATION and LT SUBSTATION?

11 Answers   NTPC, Sail,

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what is the use of starter in tube light?and what it contains

12 Answers   L&T, RRB,

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What is the actual calculation for transformer short circuit test?.

0 Answers  

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can we use ordinary transformer in place of autotransformer?give reasons also

1 Answers  

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1.where in India the maximum transmission voltage is operated? 2.what the methods are used to cool down the transformer?give the specific ratings of the transformer & specific cooling process. 3.how zero & negative sequence reactances are formed in a rotating machine when fault occur in the system?

2 Answers   IES,

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What happens when the polarity changes in CT? Explain briefly?

4 Answers  

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what is the pressure of vacuum circuit breaker

2 Answers  

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how will protect transformer agint overcurrent protection

6 Answers   MPSEB,

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How to calculate the slip ring induction motor rotor current and voltage.

1 Answers   Bhel,

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