• anonymous
I have a test tomorrow and I need some help with my homework! Question. The electrical resistance of a circuit is influenced by three primary factors. Possible Answers. 1. conductivity 2. shape 3. insulation 4. diameter 5. length
MIT 8.02 Electricity and Magnetism, Spring 2002
  • jamiebookeater
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  • anonymous
This should be worded the electric resistance of a conductor with DC current flowing through it. You've probably seen this formula before: \[R = \frac{ l }{ \sigma A }\] and that answers the question. Choice #2, the shape I assume means the cross-sectional shape of the conductor. This does matter if the conductor carries AC current but it is not one of the answers this question is looking for.
  • anonymous
All options are fine except the third one where by insulation doesn't play any role.About shape, it does really matter because the geometry and dimensions are determined by it.

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