A positive and a negative charge are initially 4 cm apart. When they are moved closer together
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A positive and a negative charge are initially 4 cm apart.
When they are moved closer together so that they are now only 1 cm apart, the force between them is
a. 4 times smaller than before
b. 4 times larger than before
c. 8 times larger than before
d. 16 times larger than before
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