Two identical conducting spheres having unequal positive charges q1 and q2 separated by distance r . If they are made to touch each other and then separated again to the same distance, the electrostatic force between the spheres in this case will be (neglect induction of charges)

Question

Two identical conducting spheres having unequal positive charges q1 and q2 separated by distance r . If they are made to touch each other and then separated again to the same distance, the electrostatic force between the spheres in this case will be (neglect induction of charges) (A) less than before (B) same as before (C) more than before (D) zero

Tardigrade Admin · Accepted Answer

F1 propto q1 q2 and F2 propto ((q1+q2)2/4) Thus, F2 > F1

Q. Two identical conducting spheres having unequal positive charges $q_{1}$ and $q_{2}$ separated by distance $r .$ If they are made to touch each other and then separated again to the same distance, the electrostatic force between the spheres in this case will be (neglect induction of charges)

less than before

same as before

more than before

zero

$F_{1} \propto q_{1} q_{2}$ and $F_{2} \propto \frac{( q _{1} + q _{2} ) ^{2}}{4}$
Thus, $F_{2} > F_{1}$

Q. Two identical conducting spheres having unequal positive charges q1​ and q2​ separated by distance r. If they are made to touch each other and then separated again to the same distance, the electrostatic force between the spheres in this case will be (neglect induction of charges)