In Fig. 21-22, the particles have charges q1 = -92 = 281 nC and 93 = -94 = 138 nC, and distance a = 3.9 cm. (a) Find the net electrostatic force on particle 3: Fnet, 3 = -0.228 > N =< 0.114 I (b) What is the vector sum of net electric forces acting on particle 1, 2, 3 and 4? Fnet,1 + Fnet,2 + Fnet,3 + Fnet, 4 = < >N a Fig. 21-22 a

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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.