cross sectional area

[searley]

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]

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

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

 

[binky]

the resistance will stay the same if you double the length and double the CSA.

 

[paulh]

the resistance will stay the same if you double the length and double the CSA.

but that wasn't his question

 

[a1]

The answer is a quarter.

 

[a1]

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

 

[binky]

Didn't think that was what he was getting at

 

[Apache]

Do you mean he's asking 2 questions

asking the effect of resistance if length increases?

asking the effect of resistance if CSA reduced?

Could be read either way

 

[kme]

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????

 

[ABC Technical]

Correct sir.

 

[a1]

 

[paulh]

no wonder you have in excess off 2000 posts Admin!!!!!!!!!!!!!!!!!!

 

[a1]

I'm giving ext15 a run for his money.



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[SPECIAL LOCATION]

I'm giving ext15 a run for his money.

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:OApplaud Smiley:xBlushing:^O:^O:^O:^OGuiness Drink