Question

2 Jiz. Three neutral balls A,B,C (identical in all aspects) are taken and then balls A and B are charged positively and negatively respectively. Arrange the balls in decreasing order of their final masses.​

Answer 1

Answer:

When the two metal spheres are touched they will come to equal potential. And when the metal sphere are of same radius then the equal potential means equal charges.

Now the charge distribution at each steps will be-

Initially- A=+6q B=-3q C=0

Spheres A, B touched and seperated- A= +1.5q B=+1.5q C=0 ( charges will be equally distributed and total charge will be conserved for two spheres that are touched)

C and A are touched- A=+0.75q B=+1.5q C=+0.75q (same logic as above)

C and B are touched- A=+0.75q B=+1.125q C=1.125q

So the final charge on sphere C will be q

c

=+1.125q.