Question

3 cm Fe= 42N [2 p.) swer the following questions: [4 p. 1. The electric force between two charges separated a distance r is F

I got the answer for Q1 is b)9F and Q2 is b)4F
I'm not sure if those are right answer. I hope you guys could help me. Thank you!

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Answer #1

F=\frac{kq_{1}q_{2}}{r^2}

r is separation between charges

When distance between triple ,it is clear that force becomes 1/9 times (F/9). So ans is (d)

When distance is doubled , force becomes one forth (=F/4). This is because force is inversely proportional to square of separation between charges. Ans is(d)

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