Question

if two identical spheres having charges 16 micro couloumb and -8 micro couloumb are kept at same distance apart,then the force is F.They are touched and again kept at the same distance,the force becomes
(1) F
(2) F/18
(3)F/8
(4)F/2

Answer 1

When positive charges are brought into contact with negative charges neutralization occurs ad we come up with resultant charges.

Resultant charge = positive charges + negative charges.

From the question:

Positive charges = +16 coulombs

Negative charges = - 8coulombs

Resultant charge = +16 + - 8 = +8 coulombs.

The force becomes = Force / resultant charge.

F / 8