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The radius `(r)`, length `(l)` and resistance `(x)` of a thin wire are `(0.2 +- 0.02)cm, (80 +- 0.1)cm`, and `(30 +- 1) Omega` respectively. The percentage error in the specific resistance isA. `23.4%`B. `25.4%`C. `26%`D. `27.5%` |
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Answer» Correct Answer - A Specific Resistance `rho = (pi r^(2) x)/(L)` Total `%` error is `[(2Delta r)/(r) + (Delta L)/(L) + (Delta x)/(x)] xx 100` |
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