9. Three point-like charges are placed at the corners of an equilateral triangle as shown in the figure. Each side of the triangle has a length of 42.0 cm, and the point (A) is located half way between 9₁ and 92 along the side. Find the magnitude of the electric field at point (A). Let q₁ = −1.20 µC, q2 = -3.50 µC, and q3 = +4.30 μC.

Two identical point charges (q= +2.20 x 106 C) are fixed at opposite corners of a square whose sides have a length of 0.450 m. A test charge (qo = -3.10 x 108 C), with a mass of 9.40 x 10-8 kg, is released from rest at one of the corners of the square. Determine the speed of the test charge when it reaches the center of the square. Number i Units VR ·90

The drawing shows two situations in which charges are placed on the x and y axes. They are all located at the same distance of 5.40 cm from the origin O. For each of the situations in the drawing, determine the magnitude of the net electric field at the origin.

1. Compute the electric field at a point 2.0 cm from q2 along a line running toward q3 in the figure. Express the answer in component notation y 91 = -10 μC 0.10 m X 94 = +5.0 μC 0.10 m 0.10 m 92 –10 μ.C 0.10 m 3 = +5.0 μC

60.0 magnitude direction 0.500 mm (a) Red blood cells often become charged and can be treated as point charges. Healthy red blood cells are negatively charged, but unhealthy cells (due to the presence of a bacteria, for example) can become positively charged. In the figure, three red blood cells are oriented such that they are located on the corners of an equilateral triangle. The red blood cell charges are A = 2.30 pC, B = 7.30 pC, and C= -3.90 pC. Given these charges, what would the magnitude and direction of the electric field be at cell A? (1 pC = 1 x 10-¹2 C.) N/C counterclockwise from the +x-axis.

Problem 6: A positive charge of magnitude Q; = 0.45 nC is located at the origin. A negative charge Q2 = -3.5 nC is located on the positive x-axis at x = 12 cm from the origin. The point Pis located y = 18 cm above charge Q2. y R Q2 X ©theexpertta.com Part (a) Calculate the x-component of the electric field at point P due to charge Qj. Write your answer in units of N/C. Ex 1 =

Here are two charges of equal magnitude but opposite sign, separated by a distance s.  What is the direction (a – j) of the electric field at location 1 (marked with an X), and what is the direction (a – j) of the electric field at location 2 (marked with an X)?

A small plastic ball of mass 5.86 x 10-3 kg and charge +0.178 µC is suspended from an insulating thread and hangs between the plates of a capacitor (see the drawing). The ball is in equilibrium, with the thread making an angle of 30.0° with respect to the vertical. The area of each plate is 0.01293 m². What is the magnitude of the charge on each plate? Number p Units + + 30.0⁰ + TA TA T I

Three identical metallic conducting spheres carry the following charges: q1 = +4.60 μC, q2 = +1.80 μC, and q3 = −1.60 μC. The spheres that carry the charges q1 and q2 are brought into contact. Then they are separated. After that, one of those two spheres is brought into contact with the third sphere that carries the charge q3; those two are then separated as well. How many excess (or deficiency) electrons make up the final charge on the third sphere?