In this worksheet, we will practice converting between the SI unit of charge, the coulomb (C), and the number of electrons that this corresponds to.
Q2:
Static electric charges are commonly measured in microcoulombs C and in nanocoulombs (nC).
How many electrons are required to produce a charge of nC?
- A electrons
- B electrons
- C electrons
- D electrons
- E electrons
How many electrons must be removed from an initially neutral object for the object to have a net charge of µC?
- A electrons
- B electrons
- C electrons
- D electrons
- E electrons
Q3:
If electrons move through a pocket calculator during a full day’s operation, how many coulombs of charge move through it?
Q5:
A copper penny with a mass of 4.8 g is given a net positive charge of C. To determine the change in the number of electrons in the penny during the charging process, use a value of 63.5 g/mol for the atomic mass of copper and a value of 29 for the atomic number of copper.
How many more protons than electrons are there in the atoms of the penny?
- A
- B
- C
- D
- E
What is the ratio of the total number of electrons in the penny before the charging process to the number of electrons removed from the penny during the charging process?
- A
- B
- C
- D
- E
Q6:
An amoeba contains protons and has a net positive charge of 0.400 pC. What is the ratio of protons to electrons in the amoeba?
- A
- B
- C
- D
- E