jimmy1988
Mar1-11, 05:24 AM
I'm trying this question. i know that resistance is the concept of ohms law together with electric potential giving rise to V/I but i can't seem to know how to start. Please advice
A material of resistivity r is formed into the shape of a truncated cone of altitude h. The bottom end has radius b , and the top end has radius a . Assume
that the current is distributed uniformly over any circular cross section of the cone, so that
the current density does not depend on radial position. (The current density does vary
with position along the axis of the cone.) Show that the resistance between the two ends is
described by the expression: R= (density/pi)*(h/ab)
A material of resistivity r is formed into the shape of a truncated cone of altitude h. The bottom end has radius b , and the top end has radius a . Assume
that the current is distributed uniformly over any circular cross section of the cone, so that
the current density does not depend on radial position. (The current density does vary
with position along the axis of the cone.) Show that the resistance between the two ends is
described by the expression: R= (density/pi)*(h/ab)