•29 Figure 22-47a shows a nonconducting rod with a uniformly dis- tributed charge +Q. The rod forms a half-circle with radius R and produces an electric field of magnitude Eare at its center of curvature P. If the arc is collapsed to a point at distance R from P (Fig. 22-47b), by what factor is the magnitude of the electric field at P multiplied? +Q P +Q P R FR- (a) (b)

A. •B •C The electric field is uniform in this region. A is at (3,2,0) m, C is at (8,0,0) m, and É = (-200, –400, 0) N/C. What is AV along a path form A to C. %3D

• A 12µC charge is placed at the origin,what is the electric field at x= 5.0m? If an electron is placed there what would be the electric force of the field.

Physics II QI: Three charges are arranged in a triangle with side length L=2cm. All three charges equal 2nC. Find the net force (components, magnitude, and direction) on charge C. A Q2 : What is the magnitude of a point charge that would create an electric field of 1.00 N/C at points 1.00 m away?