There are two facts to know of charged objects:
- An object with excess electrons would have a charge of < 0 coulombs, as an electron has a negative charge.
- An object with excess protons would have a charge of > 0 coulombs, as a proton has a positive charge.
However, question 8 asks the reader the following:
The amount of charge carried by a lightning bolt is estimated at 10 Coulombs. What quantity of excess electrons is carried by the lightning bolt?
This implies that a lightning bolt has a positive charge of 10 coulombs, so could not have an excess number of electrons. Is this an error in the question, or do we refer to charges as positive irrespective of the sign?