what is working of communitator in a dc generator?

3 Answers  

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why field rhoestat is kept in minimum position while armature rheostat at maximun position?

3 Answers  

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Why frequency fix in 50 Hz?

6 Answers  

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In short transmission line,why does the receiving end voltage is less than sending end voltage?

4 Answers  

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how much leakage current is allowed in MC61A L&T make relay?

0 Answers   Siemens,

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How much kv gas generator is needed to run 2 hp and 1 hp airconditioners, plus a refrigerator and 4 Tvs

1 Answers  

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what is advertised hop count

0 Answers  

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why on axial hitting up of air blast on hydrogen produced in oil circuit breaker,temperature rises of the core of the arc?

0 Answers  

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Why back emf used for a dc motor? Highlight its significance.

0 Answers  

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how many types of motor can be used in washing machine

0 Answers  

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what is difference between neutral and earth

5 Answers   HP,

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ASTM D 3455 - Standard Test Methods for Compatibility of Construction Material with Electrical Insulating Oil of Petroleum Origin has been used for Testing Transformer Oils with a product placed in it. Aged Control Oil has a Power Factor of 0.032% at 100°C. Aged Oil with a Test component has a Power Factor of 0.093% at 100°. Is this increase acceptable? If not why? How much increase is acceptable?

0 Answers  

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