Plot a graph showing the variation of coulomb force (F) versus 1/r2 , where r is the distance between the two charges of each pair of charges: (3µC, 2µC) and (6µC, –3µC). Interpret the graphs obtained. Ans: Interpretation: magnitude of the slope is proportional to the strength of the force. Sign of the slope indicate the nature of the force. Positive slope indicate repulsive forces (like charges) and negative slope indicate attractive force(unlike charges)

Dear Student,
The graph showing the plots of force versus 1/r2 for the pair of charges are shown below:
So, the force due to like charges are repulsive while that of oppposite charges are attractive in nature.

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