In the experiment of Ohm's law, when potential difference of 10.0 V is applied, current measured is 1.00 A. If length of wire is found to be 10.0cm and diameter of wire 2.50 mm, then find maximum permissible percentage error in resistivity.

Options

A. `1.8%`
B. `10.2%`
C. `3.8%`
D. `5.75%`

Answer

C

Explanation

`((dp)/(p))_(max)`
`=2((0.01)/(2.50))+((0.1)/(10.0))+((0.1)/(10.0))+((0.01)/(1.00))`
`=3.8%`