cross sectional area

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searley

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am i going in the right direction here.

if a conductor has a resistance of 0.25 ohms if the lengh of a conductor is doubled and the csa of the conductor is halved,the resistance will stay at 0.25 ohms.Guiness Drink

 

paulh

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no................

Double the length means double the resistance and half the csa means double the resistance so..........25x2=.5 & .5x2=1

 

paulh

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the resistance will stay the same if you double the length and double the CSA.
but that wasn't his question

 

Admin1

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if the lengh of a conductor is doubled and the csa of the conductor is halved

 
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In the office again.
The answer is a quarter.
:_| Whichever way you read that question Admin, I`m afraid that a quarter is not, and cannot be correct.Blushing

If the conductor has a resistance of 0.25........

As Paul says, doubling its length will double its resistance = 0.5

OR halving the csa will similarly double its resistance = 0.5

ergo: doing both will produce both effects together-0.25 x 2 = 0.5 x 2 = 1

ok????

 

Admin1

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I'm giving ext15 a run for his money. :eek:

:D

]:)

 
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