Question 103: Current Electricity

Question

Consider a thin square sheet of side L and thickness, made of a material of resistivity $$\rho$$. The resistance between two opposite faces, shown by the shaded areas in the figure is

Accepted Answer

The sheet is of square shape with thickness t, width $$\omega$$ = L, and length l = L. The resistance between the two opposite faces is given by
$$R = {{\rho l} \over A} = {{\rho l} \over {wt}} = {{\rho L} \over {Lt}} = {\rho  \over t}$$.

Answer

directly proportional to L.

Answer

directly proportional to t.

Answer

independent to L.

Answer

independent of t.

Current Electricity

Consider a thin square sheet of side L and thickness, made of a material of resistivity $\rho$. The resistance between two opposite faces, shown by the shaded areas in the figure is

Choose the correct answer: