A square metal plate of edge length 9.6 cm and negligible thickness has a total charge of 5.9 the electric field just off the center of the plate (at, say, a distance of 0.66 mm from the cente uniformly over the two faces of the plate. (b) Estimate E at a distance of 23 m (large relative is a charged particle. (a) Number i Units

On the x-y plane, a point charge Q = –4.35E-6 C is placed at the origin (0.00 m, 0.00m). The electric field at (x,y) =  (2.40 m, 3.20 m) is measured to be Q = Ex + Ey . What is the electric field's y componentEy (in N/C)?

This is an approximate model of a water molecule. Point charges q1 and q2 of -1.00 x 10-19 C and 1.00 x 10-19 C, respectively, are placed 0.600 x 10-12 m apart. Thus d = 0.300 x 10-12 m in fig. 2 below, D= 0.600 x 10-12 m At point b, what must be the y-component Eynet of the net electric field due to the two charges? Show work.  At point b, what is the x-component Exnet of the net electric field due to the two charges? At point b, what is the direction of the net electric field due to the two charges? Indicate this direction by drawing an arrow in fig. 2 with its tail at point b. At point b, what is the magnitude of the net electric field due to the two charges? What is the relationship between your answer here and your answer to part (e)?

In the early 1900's Robert Millikan discovered the peculiar property that charge came in little packets, no smaller than e = 1.602 x 10-19 C -- he had measured the charge of the electron. Here's (roughly) how he did it.  He removed an electron from an initially neutral droplet of oil with diameter 0.5 ??μm. In a vacuum, he positioned the droplet between two metallic plates separated by 6 mm and fiddled with the potential (voltage) across the plates until the droplet would hover against the force of gravity. Droplets of this size with +e charge would hover, but only for a particular voltage (otherwise they would sink or rise).  Given the parameters stated here, and the fact that the density of the oil was 831 kg/m3, what was the voltage that made the droplets hover? (give your answer with 0.1 V precision)