1. Batteries power much of our modern mobile lifestyle. AA batteries are often rated in units of milliampere-hours (mAh). This unit is actually a measure of the charge that the battery contains, and may be converted directly to coulombs by the formula 1 mAh = = 3.6 C. How many coulombs of charge are contained in a AA battery rated at 1500 mAH? 2. Thirty-five coulombs of charge flow through a wire in 2 minutes. Determine the current in the wire.
3. If 2 mA of current flow in your mp3 player, how long will it take for 1C of charge to flow?

Assume that two of the electrons at the negative terminal have attached themselves to a nearby neutral atom. there is now a negative ion with a charge -2e at this terminal. what are the electric potential and electric potential energy of the negative ion relative to the electron? the electric potential and the electric potential energy are both twice as much. the electric potential is twice as much and the electric potential energy is the same. the electric potential is the same and the electric potential energy is twice as much. the electric potential and the electric potential energy are both the same. the electric potential is the same and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron. the electric potential is twice as much and the electric potential energy is increased by the mass ratio of the oxygen ion to the electron.