Question

Two metal balls of same radii are charged to 5 and -25 units of electricity . They are brought in contact with each other and then again seperated to original distance. Ratio of magnitude of force b/w two balls after and before contact is

Answer 1

in the force equation of magnetic charges

keep distance between two bodies as r itself

then find the force

it will be something like c/r² where c = k*q1*q2

so now after they touch each other

both will have the charge of -10    (-25+5 = -20 and this is equally distributed to both, so -10)

now find the force again in the form of p/r² where p=k*q*q

now the force ratio is (p/r²)/(c/r²)

so force = p/c

goodluck