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Home  >>  AIMS  >>  Class11  >>  Physics  >>  Units and Measurement
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Given: specific resistance , $ \rho = \large\frac{\pi r^2 R}{l}$ where r is the radius of a wire, l is the length of the wire and R is the resistance of the wire. Calculate radius of a wire, I is the length of the wire and R is the resistance of the wire. Calculate the percentage error in $ \rho$ , if $R = (64 \pm 2)$ ohm; $l = (156.0 \pm 0.1)$ cm; $r = (0.26 \pm 0.02)$ cm.

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18.6
Hence (C) is the correct answer.
answered Jun 1, 2014 by thanvigandhi_1
 

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