- #1

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1-If a diameter of a wire is doubled,what happens to its electicial resistivity?

2-Why is different the resistivity of materials?

Thanks

- Thread starter cemx
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- #1

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1-If a diameter of a wire is doubled,what happens to its electicial resistivity?

2-Why is different the resistivity of materials?

Thanks

- #2

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What do you think?

- #3

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These questions arent that tough if take some time to look things up (such as the formula for electrical resistivity...)

1-If a diameter of a wire is doubled,what happens to its electicial resistivity?

2-Why is different the resistivity of materials?

Thanks

**whistles** http://en.wikipedia.org/wiki/Resistivity

- #4

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- #5

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How do metals conduct electricity?

- #6

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Hmm... I think you still have some work to do on number one.

Look at the second equation down on the wiki page i posted

- #7

- 2,017

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:D

So assuming q1 is written down correctly, what he said is fine.

- #8

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I understand the second question.İt's different because every material have different R,r,l,AYes and it shows that resistance will change, not resistivity which is a property of the materal.

Is it correct?

- #9

- 2,017

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what you have stated does not show that.

btw are you talking about resistivity or resistance in the orig question? Just making sure you are answering the right q.

- #10

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thank you so much brother I am really sure about it.My teacher gave me 100 points.Thank you again

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