3. Two charges, each equal to +2.90 μC, are placed at two corners of a square 0.500 m on each side as shown in the diagram below. Find the net electric field at the corner labeled P. q1 P 92

Four point charges have the same magnitude of 1.9 × 10-12 C and are fixed to the corners of a square that is 4.5 cm on a side. Three of the charges are positive and one is negative. Determine the magnitude of the net electric field that exists at the center of the square. Number i ! Units N/C

Two charged small spheres are 20 cm apart and the magnitude of the force of repulsion between them is 4.57 10− ^21 N. If one sphere carries a charge q1 = −1.6 μC, a. What charge (q2) must be present on the other sphere? (5 pts.) b. Is charge q2 positive or negative? How do you know? (2 pts.) c. Find the number of electrons present on q1.

Two charges, Q₁- 3.70 μC, and Q₂ 6.00 μC are located points (0,-2.50 cm) and (0,+2.50 cm), as shown in the figure. What is the magnitude of the electric field at point P, located at (6.50 cm, 0), due to Q₁ alone? 6.86x105 N/C You are correct. Previous Tries What is the x-component of the total electric field at P? Subm A Tries 0/20 What is the y-component of the total electric field at P? Sub Tries 0/20 What is the magnitude of the total electric field at P? SubmAnTries 0/20 Now let Q₂ Q1 = 3.70 μC. Note that the problem now has a symmetry that you should exploit in your solution. What is the magnitude of the total electric field at P? SubArTries 0/20 Given the symmetric situation of the previous problem, what is the magnitude of the force on an electron placed at point P? Submit A Tries 0/20