Identical isolated conducting spheres 1 and 2 have equal
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Identical isolated conducting spheres 1 and 2 have equal charges and are separated by a distance that is large compared with their diameters (Fig. 21-22a). The electrostatic force acting on sphere 2 due to sphere 1 is . Suppose now that a third identical sphere 3, having an insulating handle and initially neutral, is touched first to sphere 1 (Fig. 21-22b), then to sphere 2 (Fig. 21-22c), and finally removed (Fig. 21-22d). The electrostatic force that now acts on sphere 2 has magnitude F,.What is the ratio F,/F? F : (a) 1 2 (b ) 1 2 3 (c ) 1 2 (d) 1 2 3 F F' F F' Figure 21-22 2.
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