Two unlike charges separated by a distance of 1m attract each other with a force 0.108N. If the charges are in the ratio 1:3, the weak charge is?A. 2 micro C ,B. 4 micro C, C. 6 micro C, D. 5 microC

Here q₁:q₂₌1:3,

3q₁₌q₂,

we know F=k(q₁q₂)/(r²)

where k=9x10⁹N-m²/C²

thus 0.108=9x10⁹(3(q₂)²)/1²

q₂=2x10^-6C

therefore the weak charge is 2micro C.

i think it is 2 microC

let charges be x,3x;

f=3x*x*9*10^9          =>x= 2 micro

The answer is 4 micro C. But it could be wrong.