Electric field inside a copper wire of length 10 meter, resistance 2 ohm connected to a 10 volt battery is (in SI units)

Options

A. 1 V/m
B. 2 V/m
C. 3 V/m
D. 4 V/m

Answer

A

Explanation

`x_(cm) = (intxdm)/(intdm) = (int_(0)^(L) k ((x)/(L))^(n) xdm)/(int_(0)^(L) k ((x)/(L))^(n) dx) = ((n + 1)/(n + 2)) L`
For `n = 0, x_(cm) = (L)/(2)` and for `n rarr theta, x_(cm) = L`