What would the final charge on the rod be?

[pandamonium786]

I had a question.

If a glass rod, with a charge of 5.4x108 C touched another insulator so that all of the excess electrons are shared equally. What would the final charge on the rod be?

I don't understand how to reach the answer of 2.7 x108 C.

Thanks in advance. :)

 

[Bystander]

How many objects are sharing the total charge?

 

[pandamonium786]

How many objects are sharing the total charge?

2 objects. The glass rod and the insulator.

 

[Bystander]

Have you run into any conservation law regarding charge?

 

[pandamonium786]

Have you run into any conservation law regarding charge?

The way I got the answer just now is by making each rod have half the excess electrons. So dividing 5.4 by 2 to = 2.7 x 10^8 C final charge.
I got the answer but i don't know why i am right.

 

[Bystander]

why i am right

Charge is a conserved quantity, one of seven such.