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Please explain the process of charging by contact and chargng by induction?
Suppose we touch a positively charged glass rod to an uncharged copper rod. Electrons will flow from the copper to neutralize the positive charges on the glass. However, because electrons do not flow through the glass, they can neutralize only those positive charges at the point of contact with the copper. To remove additional electrons from the copper, we can “wipe” the glass rod along the copper rod, thereby transferring electrons to fresh, un-neutralized areas of the glass that come into contact with the copper. If we then remove the glass rod, the copper remains with a deficiency of electrons and therefore a net positive charge. Electrons will flow through the copper so that the positive charges are evenly distributed along the surface of the copper. The direct transfer of charge from one object to another is called charging by contact
If we attach a wire between the positive end of the copper and ground electrons will flow from ground to neutralize the positive charges in the copper. Leaving the glass rod in place, if we then remove the connection to ground, the copper rod retains a net negative charge. If we then remove the glass rod the negative charges will distribute themselves over the surface of the copper to be as far apart from one another as possible. This method of charging an object is called charging by Induction.
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