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sola
Participant

Join Date: Nov 2010
Posts: 1

Asking for Formula and Working Details as a Beginner Electrical Engineer

11/13/2010 7:31 AM

A current of 50A is carried by two cables in parallel. One cable has a resistance of 0.15ohms-and carries 20A. What is the resistance of the other cable?
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Mizuti
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Join Date: Jun 2010
Location: New York
Posts: 972
Good Answers: 23
#1

Re: Asking for Formula and Working Details as a Beginner Electrical Engineer

11/13/2010 10:58 AM

Calculate the voltage for the cable you know. Because it's in parallel, the voltage will be the same across both cables. So, you know the voltage, and you know the current , then just calculate the resistance.

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 The first law of thermodynamics is you do NOT talk about thermodynamics.
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Yuri B.
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Join Date: Jun 2009
Posts: 262
Good Answers: 1
#2

Re: Asking for Formula and Working Details as a Beginner Electrical Engineer

11/13/2010 11:36 AM

0,1 Ohm.
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wareagle
Guru
United States - Member - New Member

Join Date: Jun 2008
Location: Alabama
Posts: 1604
Good Answers: 63
#3

Re: Asking for Formula and Working Details as a Beginner Electrical Engineer

11/13/2010 1:23 PM

This is a simple circuit of 2 resistors in parallel. The current divides inversely proportional to the resistance. Draw the circuit and use
Ohm's law.
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Anonymous Poster
#4

Re: Asking for Formula and Working Details as a Beginner Electrical Engineer

11/15/2010 9:37 AM

sorry to tell that you that you are not an electrical engineer.

even a college or a highschool student could do that.. please try to solve it... it is just a parallel circuit.. how did you become an electrical engineer?
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Anonymous Poster
#5

Re: Asking for Formula and Working Details as a Beginner Electrical Engineer

11/21/2010 3:39 AM

This is the very tough question ever posted in the forum. I am also waiting for the calculation. It is too hard for an electrical engineer to understand and calculate this type of highly complicated problems. Please ask your Boss to do not give you such targets any more. I want to help you. But need three page calculation and plenty of time behind that.
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Anonymous Poster (2); Mizuti (1); wareagle (1); Yuri B. (1)

Previous in Forum: Motor Connection - Ladder Diagram of Star Delta   Next in Forum: 3P 115A Contactor Coil Power Consumption
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