how are changes generated
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An electrical charge is created when two materials come into contact or are rubbed together. When the materials are in contact, electrons can be literally rubbed off of one object and onto the other. ... Materials towards the positive end give up electrons when brought into contact with materials towards the negative end.
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change are generated when the Physical and chemical changes of th substance changes due i some reasons like heating. We can divide change int o two types- physical change and chemical change.
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