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Electric Charges

# Electric Charges - Physics 202 Tuesday Announcements...

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Physics 202 Tuesday, January 19, 1999 Announcements: Homework Schedule pushed back by one week due to the snow day. Lab Schedule will remain the same. Lecture notes: Electric Charges All objects tend to contain equal amount of negative and positive charges and stay electrically neutral It is possible for an object to pick up an excess of negative charges ( electrons) and become negatively charged. It is also possible for an object to shed some of its electrons and become positively charged The smallest quantity of charge to be transferred is that contained in an electron (-e = 1.6 x 10 -19 Coulomb) o The amount of charge to be transferred comes in "quantized" units of that in an electron o q=ne o n= + 1, + 2, + 3 . ... The number of electrons picked up or shed by an object can be very large ( n= 10 9 to 10 10 ) but it is still very small compared to the total number of electrons and protons in an object. o

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Electric Charges - Physics 202 Tuesday Announcements...

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