Left-hand scale 0 -----==---===7 s卫 0.6 Z/L Left-hand scale Right-hand scale Fig. 3, Surface charge densities (radial electrical field at surface in units of V/L)and voltage drop(in units of V) along the wires op along the column is surface charge density(top) is confined to the immediate neighborhood of the resistor. when the voltage distribution along the is very different from that along the column, the charge distribution along the wire(bottom)is large and negative for z/L>0.3 in 二 dial clectric field at the wire and maintain its potential near zero provide the electric field across the gap ne circuit is circuit determined by current conservation and Ohm's law closed by inserting the resistor, current d there inside the wires and resistor, regardless of the circuit's geo- changes in the surface charges and the of various metrical configuration. But because the resistance of the rest parts of the circuit, with the potential at any point around the of the circuit is small compared to that of the resistor, almost 1. D. Jackson 858