Question

Initialy sphere A has charge of -50e and sphere B has
charge of +20e. The spheres are made of conducting
material and are
identical in size. If the sphere are
then touch, what is the resulting charge on sphere A?
​

Answer 1

Answer:

The force exerted by the charges is given as follows.

F

1

=

4πε

0

1

r

2

q

1

q

2

.

F

2

=

k

1

4πε

0

1

r

2

q

1

q

2

.

Therefore,

F

2

F

1

=

k

1

orF

2

=

k

F

1

.

That is,

F

2

=

2

F

1

ask=2(given).

Hence, the force is F/2.