1. Consider the four point charges arranged on the corners of a square as shown. Let the direction up towards the top of the page be N. The electric field at the center of the square will point (a) N (b) S (c) E (d) W (e) NE (d) NW (e) SE (f) SW +4 d 2. The diagram shows a current loon carrying current as shown. It is offectively

Find the force of electrical attraction between a proton and an electron that are 8.7 x 10-11 m apart. Compare this to the gravitational force between these particles. N Need Help? Read It Talk to a Tutor O vA 11:44 esc DII %23 $ & backspace 1 2 3 4 6 8 tab e t y a f enter shift V n m shift alt alt str)

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Which of the following electrostatic fields could exist in a finite region of space that contains no charges? (In these expressions, A is a constant, i, j and k are unit vectors pointing in the x, y and z direction, respectively.) a. A (2xy i - x k) b. A (xz i + xz j) c. A xyz (i + j) d. A (-y j+ z k) е. А хуz i a O b

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(a) A physics lab instructor is working on a new demonstration. She attaches two identical iron spheres with mass m = 0.190 g to filaments of length L as shown in the figure. L. Both spheres have the same charge of 7.60 nC, and are in static equilibrium when 0 = 5.20°. What is L (in m)? Assume the filaments are massless. 0.31 (b) What If? The charge on both spheres is increased until each filament makes an angle of 0 = 10.4° with the vertical. If both spheres have the same electric charge, what is the charge (in nC) on each sphere in this case? 2.16E-8 Use the same reasoning as in part (a), only now, use the length found in part (a) and the new angle to solve for the charge. nC

Two conductor wires of linear charge density lambda, one of them of infinite length and the other of length a, are placed as indicated in the figure and are in the same plane. Determine the electrical repulsion force between both wires.   A. F= 2K2ln 3   B. F=0   C. F= K 2 ln 3   D. F= 2K  ln 2 /a   E. F= K  ln 3    F. F = k Q/a2   G. F= 2 K ln2

Hi, please also explain how you got the answer and also explain why that is the right answer. This is the right answer please explain. (B)