(a) Sketch the electric field around two identical, positively charged particles separated by a small distance. What would change if the particles were both negatively charged ? (b) A water droplet of mass 50.0mg is located in the air near the ground during a stormy day. An atmo- spheric electric field of magnitude 6.00 x 10³N/C points vertically downward in the vicinity of the water droplet. The droplet remains suspended at rest in the air. What is the electric charge on the droplet? (c) An electron enters the region of a uniform electric field as shown in the figure below, with v; = 3.00 × 106 m/s and E 200 N/C. The horizontal length of the plates is l = 0.100 m. What is the vertical displacement of the charge at the end of this setup? In other words, assuming the ver- tical position of the electron as it enters the field is y; = 0, what is its vertical position when it leaves the field? (0, 0) E + ++ y

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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.