Answer:
Resistance of the iron rod, R = 0.000077 ohms
Explanation:
It is given that,
Area of iron rod, [tex]A=10\ cm\times 0.5\ cm=5\ cm^2 = 0.0005\ m^2[/tex]
Length of the rod, L = 35 cm = 0.35 m
Resistivity of Iron, [tex]\rho=11\times 10^{-8}\ \Omega-m[/tex]
We need to find the resistance of the iron rod. It is given by :
[tex]R=\rho\dfrac{L}{A}[/tex]
[tex]R=11\times 10^{-8}\times \dfrac{0.35\ m}{0.0005\ m^2}[/tex]
[tex]R=0.000077 \Omega[/tex]
So, the resistance of the rod is 0.000077 ohms. Hence, this is the required solution.
