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The specific resistance rho of a circula...

The specific resistance `rho` of a circular wire of radius `r`, resistance `R`, and length `l` is given by `rho = pi r^(2) R//l`. Given : ` r = 0.24 +- 0.02 cm , R = 30 +- 1 Omega` , and `l = 4.80 +- 0.01 cm`. The percentage error in `rho` is nearly

A

`7%`

B

`9%`

C

`1%`

D

`20%`

Text Solution

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The correct Answer is:
C
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