Science, asked by NeelRocks, 1 month ago

Two equal and similar charges q separated by distance r of repel each other with a force F. On adding +4 to one and -4 to other. the force between them decreases to 0.8F. Find q​

Answers

Answered by brainaxe21
3

Explanation:

F=(kq^2)/r^2. eq1

0.8F=(k(q+4)(q-4))/r^2. eq2

eq2/eq1,

0.8=(q^2-16)/q^2

0.8=1-16/q^2

16/q^2=0.2

q^2= 16/0.2

q^2=80

q=approx 9(plus minus)

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