9. The figure shows three pairs of plates. The electrostatic force between the plates is shown for two of this.if B is negative ,what is the charge of A ? and what kind of force exists in the third pair?
A. negative,attractive
B. negative,repulsive
C. positive, attractive
D. positive, repulsive
NOTE:IF YOUR ANSWER IS NONSENCE I WILL REPORT YOUR ANSWER ^_^
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Answer:
9. The figure shows three pairs of plates. The electrostatic force between the plates is shown for two of this.if B is negative ,what is the charge of A ? and what kind of force exists in the third pair?
A. negative,attractive