In an experiment, current measured is, `I = 10.0 A`, potential difference measured is `V = 100.0 V`, length of the wire is `31.4 cm` and the diameter of the wire ` 2.00 mm` (all in correct significant figures). Find resistivity of the wire in correct significant figures. [Take `pi = 3.14`, exact].
(a)
(b)
(c)
(d) .

Answer

A, D

Explanation

`rho = (pid^2V)/(4lI) =((3.14)(2.00 xx 10^-3)(100.0))/((4)(31.4)(10.0)xx10^-2`
`1.00 xx 10^-4 Omega - m` (to three significant figures).