[填空题]
A rectangular solid made of ca+o:95*l m(autrdt iu g1-yofh rbon has sides of(7( 1qyang dphfz5 bb* lengths 1.0 cm, 2.0 cm, and 4.0 cm, lying along the x, y, and z axes, respectively (Fig. 18–35). (*7bfa1dy5b pnh z(qg Determine the resistance for current that passes through the solid in
(a) the x direction, $ \times10^{ -4}\;\Omega$
(b) the y direction, $ \times10^{ -3}\;\Omega$
(c) the z direction. Assume the resistivity is $\rho\,=\,3.0\times10^{ -5}\;\Omega\cdot m$.
$ \times10^{ -3}\;\Omega$
