Two identical metal spheres gallery charges + q and minus 2 respectively when the spheres are separated by a large - Physics - Work Energy and Power

Question

Two identical metal spheres gallery charges + q and minus 2
respectively when the spheres are separated by a large distance are
the force of the f between them is now the spheres are allowed to
touch and then move back to the same separation find the new force
of repulsion between them

Hempushp Katara · Accepted Answer

Dear Student

The force between+q and-2q at a distance r is given as F NowF=K((+q)×(-2q))r2=-2kq2r2When the chages +q and–2q comes in contact,then it neutralises the chage+q by–q charge and left only–q
These-q charge will be equally distributed both the sphare
If it is seperated the two sphere again then each sphere will aquire amount of charge of–q2 and–q2
Now the new force between them will beFn=K((–q2)2)2=14((kq22))=(-F)8So the force will be 1/8 part of previous force and it will be repulsive foce while F was attractive

Regards

Two identical metal spheres gallery charges + q and minus 2 respectively when the spheres are separated by a large distance are the force of the f between them is now the spheres are allowed to touch and then move back to the same separation find the new force of repulsion between them