A glass rod that has been charged to + 11.0 nC touches a metal sphere. Afterward

Question

A glass rod that has been charged to + 11.0 nC touches a metal sphere. Afterward, the rod's charge is + 1.0 nC. What kind of charged particle was transferred between the rod and the sphere, and in which direction? That is, did it move from the rod to the sphere or from the sphere to the rod? electrons, from the rod to the sphere protons, from the rod to the sphere electrons, from the sphere to the rod protons, from the sphere to the rod How many charged particles were transferred? Express your answer using two significant figures.

Explanation / Answer

part A:

as glass rod loses positive charge, it means it receives negative charge from the sphere

so electrons get transferred from sphere to rod.

third option is correct.

Part B:

total charge transferred=1 nC-11 nC=-10 nC

then number of electrons are transferred

=total charge/charge on each electron

=-10*10^(-9)/(-1.6*10^(-19))=6.25*10^10

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