question: Ac is better than dc for doing what?
distractor3: stopping electrical ebergy
distractor1: cooking electrcal energy
distractor2: storing electrical energy
correct_answer: transporting electrcal energy
support: Alternating Current (AC): Voltage pushes (so current flows) in alternate directions, back and forth. In the US they reverse direction 60 times a second (60 Hz). AC is more convenient than DC for transporting electrical energy. Below is a plot of voltage vs. time for a standard circuit in the USA.