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A small positive charge q experiences a force of magnitude F1, when placed at point 1 in Figure Q20.18. In terms of F1:
Figure Q20.18
a. What is the magnitude of the force on charge q at point 3?
b. What is the magnitude of the force on a charge 3q at point 1?
c. What is the magnitude of the force on a charge 2q at point 2?
d. What is the magnitude of the force on a charge –2q at point 2?
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