Charge transfer between two insulators rubbed together

[Arsen34]

How much charge is actually transferred when two insulators are rubbed together?
Example: When glass rod and wool are rubbed together

 

[berkeman]

How much charge is actually transferred when two insulators are rubbed together?
Example: When glass rod and wool are rubbed together

Welcome to the PF.

One ballpark number can be calculated by using the capacitance of the "Human Body Model" used for ESD testing. The parasitic capacitance of the human body is often approximated as 100pF-220pF, and you can charge yourself up to a couple kV by rubbing the materials.

Are you familiar with the equation relating the charge on a capacitor to the capacitance and voltage?