(a) A small Styrofoam bead with a mass of 16.2 g and a charge of -0.646 µC is suspended in equilibrium above the center of a large, horizontal sheet of plastic that has a uniform charge density on its surface. Find the charge per unit area on the plastic sheet (in µC/m2). How is the electric force related to the weight of the bead? How is it related to the electric field of the sheet? From Gauss's law, how is the field of the sheet related to charge per unit area? pC/m2 (b) What If? What are the magnitude and direction of the acceleration of the piece of Styrofoam if its charge is doubled? (Enter the magnitude in m/s².) magnitude m/s2 direction -Select-

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Electric Charges and Fields

One of the fundamental properties is the electromagnetic property. Charge cannot be destroyed by any process and this contributes formally to the law of charge conservation.