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Education and Career Forum
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| 14th December 2012 03:51 PM | ||
| Unregistered |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? if dc current does not change with time what effect on dc transformer |
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| 4th April 2012 01:25 PM | ||
| Unregistered |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? what is not change in dc transformer? |
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| 13th March 2012 09:10 PM | ||
| kaveribiswas |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? flux should be produced in the primary winding and secondary winding of the transformer to work the transformer. from the faraday's law we know flux will produced if there is change in current in the gap of wire coil. in ac current only the current changes with time where as dc current value does not change always with tome. so dc current not be used in transformer ac current should be used. for law of thermodynamics go through any book of thermodynamics. Good luck........... |
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| 29th February 2012 03:51 PM | ||
| Unregistered |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? Dc current have no polarity change,why |
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| 18th October 2011 12:10 PM | ||
| Unregistered |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? do capacitors store charge in the same way as batteries? |
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| 1st September 2011 01:37 PM | ||
| Unregistered |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? 1.electrons in conductors actually they move from negatve pole to positive pole or they align in one direction under effect of electric field? 2.do capacitor store charge in the same way as batteries? 3.do electical charge behave as energy? 4.do ac current obey ohms law? |
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| 8th August 2011 12:51 AM | ||
| Unregistered |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? why do we prefer shaft motors for eee lab ? y shouldn't we go for other motor? |
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| 19th July 2011 02:05 PM | ||
| Unregistered |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? what is dc |
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| 1st July 2011 05:57 PM | ||
| Unregistered |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? reactive power is necessary for any applications? |
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| 24th June 2011 09:48 PM | ||
| Unregistered |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? why we need reactive power |
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| 4th May 2011 03:36 PM | ||
| carlyzza |
Any working Nexon NX Cash Generator in 2011 ? hi folks, i know "fee details of LLB course? address of LLB colleges in Hyderabad?" ain't the right section to ask for this, but justthoguth to ask if there is a working Nexon NX Cash Generator ? i have downloaded some from Yahoo but it appears nothing seem to work : ( i'm a newbie girl so please help : p |
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| 29th November 2010 04:55 PM | ||
| mini rani |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? hi! There are 2 laws of thermodynamics: First Law of Thermodynamics: "Energy can be changed from one form to another, but it cannot be created or destroyed." The total amount of energy and matter in the Universe remains constant, merely changing from one form to another. The Second Law of Thermodynamics: "in all energy exchanges, if no energy enters or leaves the system, the potential energy of the state will always be less than that of the initial state." This is also commonly referred to as entropy. Reason for not using DC current in transformer: Transformers only work on AC. AC going through one coil produces an alternating magnetic field which induces a current in the other coil. If you put DC into one coil of a transformer, it will produce only a steady magnetic field, which will have no effect on the other coil. |
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| 29th November 2010 04:22 PM | ||
| deep_4 |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? Quote:
Transformer are passive devices thattransform AC to AC by magnetics and coupling. DC IS UNIDIRECTIONAL it does not change POLARITY. While it is possible to saturate a transformer primary it output cannot reflect the change since it has reached steady state |
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| 29th November 2010 04:21 PM | ||
| deep_4 |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? Quote:
The zeroth law of thermodynamics, which underlies the basic definition of temperature. The first law of thermodynamics, which mandates conservation of energy, and states in particular that the flow of heat is a form of energy transfer. The second law of thermodynamics, which states that the entropy of an isolated macroscopic system never decreases, or (equivalently) that perpetual motion machines are impossible. The third law of thermodynamics, which concerns the entropy of a perfect crystal at absolute zero temperature, and which implies that it is impossible to cool a system all the way to exactly absolute zero. and |
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| 29th November 2010 03:42 PM | ||
| JAMESS |
Re: Why DC current not used in Transformer? State the law of Thermodynamics? flux should be produced in the primary winding and secondary winding of the transformer to work the transformer. from the faraday's law we know flux will produced if there is change in current in the gap of wire coil. in ac current only the current changes with time where as dc current value does not change always with tome. so dc current not be used in transformer ac current should be used. for law of thermodynamics go through any book of thermodynamics. you may go through the book written by Khurmi. |
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| 28th November 2010 08:11 PM | ||
| Unregistered |
Why DC current not used in Transformer? State the law of Thermodynamics? why dc current is not used in transformer. state law of thermodynamics |
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