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What is the charge on a positively charged rod when 6.25 x 10^18 electrons are removed?

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Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

This is just a conceptual question.

I have an electroscope with a needle inside and a plate on top.When holding a positively charged rod close to it the needle moves,and I understand that this is due to the movement of electrons fromthe neutrally charged needle and up to the plate, leaving theneedle on the bottom more positively charged.

But, what happens when you actually touch the rod to the plate, iknow there must be some sort of exchange or electrons but how doesthis work? does it simply balance the charge between the twoconnecting objects?

Also, how can the net charge be defined in this case. If you don'tactually touch the Rod to the plate is the net charge zero due tono exchange? Basically what is the net charge and how is it definedwhen the rod is touching and when it isnt touching, and when ittouches and is removed. thanks a bunch!

When a positively charged rod is used to charge a second rod by induction, the induced charge is

A) Positive

B) Negative

C) zero.

When a glass is rubbed with silk, the rod becomes positively charged, but when a rubber rod is rubbed with fur, the rubber becomes negatively charged. Suppose you have a charged object but don't know whether its charge is positive or negative. Explain how you could use a glass rod and a piece of silk to determine the sign of the unknown charge on the object. 

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