A charge Q1 = +3 μC is located at (-5 cm, 0) while charge Q2 = -4 μC is located at (0, +5 cm). These are the two white charges in the diagram at right. a) What is the electric field at the origin (0, 0) due to these two charges? b) If a third charge of 5 μC (the gray charge) is placed at the point (-4 cm, 3 cm), what will now be the electric field at the origin

The volume charge density of the long hollow cylinder, shown in the figure below, is rho= 4 ×10^−5 C/m^3 . Let a be the inner radius and b be the outer (total) radius. If a= 10 cm and b= 15 cm. Find the electric field at:  a) r=5 cm  b) r=12 cm c) r=25 cm

Now it's your turn Four charged particles are placed so that each particle is at the corner of a square. The sides of the square are 15 cm. The charge at the upper left corner is +3.0 µC, the charge at the upper right corner is -6.0 μC, the charge at the lower left corner is -2.4 µC, and the charge at the lower right corner is -9.0 μC. a. What is the net electric force on the +3.0 µC charge? b. What is the net electric force on the -6.0 µC charge? c. What is the net electric force on the-9.0 uC charge?

In the figure, a point charge 2.5 C is a distance d/2 directly above the center of a square of side 4.0 mm. What is the magnitude of the electric flux through the square?

Two point charges are located on a horizontal line as Shown in diagram on the right. The first small circle Represents the charge Q1 the left and small circle on right Q2 . In the middle between the two charges is point P. a) Find the net electric field due to the 2 charges at point P by finding the magnitude and direction of each one if Q1 =3μC and Q2 =5μC and distance between charges = 50 cm.