Author Question: At a distance D from a very long (essentially infinite) uniform line of charge, the electric field ... (Read 117 times)

dollx · **on:** Jul 29, 2018

At a distance D from a very long (essentially infinite) uniform line of charge, the electric field strength is 1000 N/C. At what distance from the line will the field strength to be 2000 N/C?

A) 2D
B) D
C) D/
D) D/2
E) D/4

Question 2

Two long straight parallel lines, 1 and 2, carry uniform positive linear charge densities. The charge density on line 2 is twice as great as the charge density on line 1. The locus of points where the electric field due to these lines is zero is

A) along a line between the lines closer to line 2 than line 1.
B) at a point midway between the lines.
C) along a line perpendicular to lines 1 and 2.
D) along a line between the lines closer to line 1 than line 2.