A uniformly charged disk sit in the yz-plane with its center at the origin. It has radius 2.5 cm and carries a total charge of 4.0 x 10 -12 C. What is the magnitude of the electricfield on the x-axis of the disk at the disk at distance x = 0.2 cm? What is the direction of the eletric field on the axis of the disk at x = 0.2 cm? (to the center or from the center) Is the magnitude of the electric field at x= 0.2 cm larger or smaller thant the electric field at 0.2 cm from an infinite sheet of charge with the same charge per unit area as the disk?

Three point charges are located on a circular arc as shown in the figure below. (Take r = 4.32 cm. Let to the right be the +x direction and up along the screen be the +y direction.) +3.00 nC -2.00 nC 30.0° 30.0° +3.00 nC (a) What is the total electric field at P, the center of the arc? E î N/C + ĵ N/C (b) Find the electric force that would be exerted on a -5.37-nC point charge placed at P. F = ÎN + ĵN

A neutral solid metal sphere of radius 0.1 m is at the origin, polarized by a point charge of 4 ✕ 10−8 C at location <−0.6, 0, 0> m.  At location <0, 0.08, 0> m, what is the electric field contributed by the polarization charges on the surface of the metal sphere? (Express your answer in vector form.)

A ring-shaped conductor with radius a = 2.30 cm has a total positive charge Q = 0.121 nC uniformly distributed around it. (electric field at point p which is in positive x-axis x= 35.0 cm) a) figure out the electric field very far away. Is it consistent with the coulombs law? b) figure out the electric field at the center of ring?

Consider a system of two positive charges placed along the x-axis. Charge 91 is placed at the origin, and 92 is located a distance 3r from 91. If |91| = 492, determine the magnitude of the net electric field at a point p, located a distance 2r from 91. (Put the numerical value without the units). Use k = 9 x 10°Nm²/C².

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 component Ey (in N/C)?

In a physics experiment, we place three charges at the corners of an equilateral triangle, where q1 = 2.75 μC, q2= - 3.45 μC, and q3 = 3.25 μC. If I were to measure the electric field right between charges q1 and q2, what would I find?

Problem 4:   A 4.6 g charged insulating ball hangs on a 1.15 cm long string in a uniform horizontal electric field.  Given the charge on the ball is 26 μC , find the strength of the field in N/C.

A charge distribution creates the following electric field throughout all space: E(r, 0, q) = (3/r) (r hat) + 2 sin cos sin 0(theta hat) + sin cos p (phi hat). Given this electric field, calculate the charge density at location (r, 0, p) = (ab.c).

A small plastic ball of mass m = 1.50 g is suspended by a string of length L = 17.0 cm in a uniform electric field, as shown in the figure below. If the ball is in equilibrium when the string makes a ? = 17.0° angle with the vertical as indicated, what is the net charge on the ball? A ball of mass m is attached to a string of length L and suspended from the ceiling. The string makes an acute angle ? with the normal line from the ceiling, such that the string and ball are displaced to the right of the normal line. To the right of the string and ball, five parallel, evenly-spaced, identical arrows point to the right. The arrows are vertically stacked and labeled with E = 1.00 ✕ 103 N/C. To the left of the string and ball, x y-coordinate axes demonstrate that the +x-axis points to the right and the +y-axis points up.