ch21-p004 - 4 The fact that the spheres are identical...

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4. The fact that the spheres are identical allows us to conclude that when two spheres are in contact, they share equal charge. Therefore, when a charged sphere ( q ) touches an uncharged one, they will (fairly quickly) each attain half that charge ( q /2). We start with spheres 1 and 2 each having charge q and experiencing a mutual repulsive force 22 / Fk qr = . When the neutral sphere 3 touches sphere 1, sphere 1’s charge decreases to
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