5. Which one of the following statements concerning the net electric charge on an object is true? a) An object with a net negative charge has an excess number of protons. b) The net charge can have any value greater than 1.60  10-19 coulombs. c) The net charge on an object is always a negative number. d) Since protons are larger, a proton can carry more charge than an electron. e) The net charge is quantized.