Question

the resistance of a wire 0.011 metre radius is 10 ohm if the resistivity of the material off the wire is 50 x 10 raise to 8 ohm metre find the length of the wire​

Answer 1

Answer:

6.2*10^-13 meters

Explanation:

Resistance= Resistivity*(lemgth/Area)

10 ohm=5*10^9 *(l/$\pi (0.01)x^{2}$)

therefore l=$\pi$/(5*10^12)=6.2*10^-13 meters