Question

Two identical bodies in which charges are 40uC and -20uc. They are some distance apart. Now they are
touched and kept at the same distance. The ratio of the initial to the final force between them is
8:1
o 4:1
1:8
o 1:1​

Answer 1

Answer:

Two identical bodies in which charges are 40uC and -20uc. They are some distance apart. Now they are

touched and kept at the same distance. The ratio of the initial to the final force between them is

8:1

o 4:1

1:8

o 1:1

Answer 2

Answer:

8:1

Explanation:

Initially force between conducting spheres

F1= kq1q2/r2

=k(40)(-20)/r2 equation 1

after contact total charge =40-20=20microc

now charge will be equally distributed

q1=q2=20/2=10microc

finally F2=k(10)(10)/r2 equation 2

Ratio of forces =F1/F2=40×20/10×10

=8/1 [8:1]