The charge of one electron is
e≈−1.6×10−19C The charge of one proton is
p≈1.6×10−19C 1. 15 protons and 15 electrons compensate each other, and the total charge is caused by one extra electron. Thus:
q1=e=−1.6×10−19C 2. 100 protons and 100 electrons compensate each other, and the total charge is caused by 20 extra protons:
q2=20p=20⋅1.6×10−19C=3.2×10−18C 3. Since the initially neutral object looses 100 electrons, it will have 100 not compensated protons. Thus, its total charge will be:
q3=100p=100⋅1.6×10−19C=1.6×10−17C Answer. 1. −1.6×10−19C
2. 3.2×10−18C
3. 1.6×10−17C
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