What Causes Energy Loss in Cables?

[salihdemir]

Hello,

I am studying transformers now for the exam and I came across this question. It made a confusion in my mind. I took the photo of the question and put it into attachment.

The answers B and C looks very similar to each other and in my humble opinion both of them are true. I would be very happy if somebody explains which is true and why.

Thank you very much.

Salih

 

[voko]

Analyze C using Kirchhoff's circuit laws.

 

[lep11]

B is true. And the longer the wire is the bigger the resistance will be.

 

[salihdemir]

Thank you, I understand now, the current must be the same everywhere. I thought in the first that because the current is being used in the long leeds, it is decreasing. But I understand that this is a misconception.

 

[Nickie]

Hello Salih,

Thank you for your question. I can understand why the answers B and C may seem similar to you. Both statements mention energy loss in cables, but there is a subtle difference between the two.

Answer B states that energy loss in cables is due to resistance, which is correct. When electricity flows through a cable, it encounters resistance, which causes some of the energy to be converted into heat and lost. This is known as resistive heating.

On the other hand, answer C states that energy loss in cables is due to leakage, which is also true but in a different context. Leakage refers to the loss of energy through the insulation or coating of the cable. This can happen if the cable is damaged or if the insulation is not of high quality. In this case, the energy is not lost due to resistance, but rather because it is escaping through the insulation.

Both resistance and leakage can contribute to energy loss in cables, but they are two different mechanisms. Therefore, answer B is more accurate in explaining the cause of energy loss in cables.

I hope this explanation clears up any confusion you may have had. Good luck on your exam!

Best,