Four charges are at the corners of a square of side length 1 µm. Four charges are q1 = –4 nC, q2 = 4 nC, q3 = 4 nC and q4 = –4 nC. You may put the charges in any order. Find the electric potential at the center of the square. What is the total electric potential energy of the system? %3D

Particles A, B, C, and D in (Figure 1) each carry a charge of magnitude 1.0 nC. Express your answer with the appropriate units. U = 0 J Submit Previous Answers Part C Correct Calculate the electric potential energy for the charge distribution in this 3.0-m square if B and C are positive and A and D are negative. Express your answer with the appropriate units. ΜΑ ? U = Value Units Submit Request Answer <1 of 1 Part D Calculate the electric potential energy for the charge distribution in this 3.0-m square if A and C are positive and B and D are negative. Express your answer with the appropriate units. Figure A+ +B HA ? U = Value Units

I Review I Constants A 11.0 nC charge is at x = Ocm and a -1.3 nC charge is at x = 7 cm . Part A At what point or points on the x-axis is the electric potential zero? Express your answer using two significant figures. If there is more than one answer, give each answer separated by a comma. V ΑΣφ Xo = cm Submit Previous Answers Request Answer

X 2) Four charges are arranged in the pattern shown. They have equal magnitudes of 1nC but have the signs shown. Three locations, labeled X, Y, and Z, are highlighted. 2 1 A 2 m 2 m 2 m i. The electric potential energy stored by this arrangement of charges is A. Positive Negative B. C. Zero ii. The electric potential at point Z (using the standard reference point) is A. B. A. 0 B. 1.5 V C. 4.5 V D. 6.0 V E. 12 V iii. The electric potential at point X (using the standard reference point) is 3.0 V 3.3 V C. 4.5 V D. 7.5 V E. 18 V 2 m 3 (+) 2 m 4 m 4