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What happens when a charged insulator is placed near an uncharged metallic object?
What happens when a charged insulator is placed near an uncharged metallic object? (a)
They repel each other. (b) They attract each other. (c) They may attract or repel each other,
depending on whether the charge on the insulator is positive or negative. (d) They exert no
electrostatic force on each other. (e) The charged insulator always spontaneously discharges.
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1) % = (Wo /Wi) * 100
Solve for Wo => Wo = (% / 100) * Wi
For example, % =30% and Wi = 250 => Wo = (30 /100) * 250 = 0.30 * 250 = 75
Wo = 75
2) % = (Wo / Wi) * 100
Solve for Wi
=> Wi = Wo * (%/100)
For example, Wo = 125 and % = 40%
=> Wi = 125 * (40 / 100) = 125 * 0.40 = 50
Wi = 50