Question

A rod is 4.0 m long and has a square cross-section that is 1.5 cm on each side. An ohmmeter measures 0.040 Ω across its ends. What is the resistivity of the material from which this rod is made?

Answer 1

2.25 x 10^-6 ohm - m 2.25 x 10^-4 ohm - cm

Step-by-step explanation:

rho = R A/l

R = .040

A = .015 * .015 m^2

l = 4 rho =