Question

2. Two ions with charges qc and qo begin at a distance r apart from each other. It is observed that qc exerts a repulsive force on qo
e. Go back to the original situation. Now, suppose the original se the force on go change? duced to A. 6.25 times the original force B. 2.5 times the original force C. unchanged D. 0.4 times the original force E. 0.16 times the original force
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Answer #1

Here ,

as the force is proportional to 1/r^2

when the distance is made 0.4 times

new force = 1/0.4^2 times

new force = 6.25 times

the new force is 6.25 times

A) 6.25 times the original force

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