1. The problem statement, all variables and given/known data A portable CD player could be designed to operate at 240V. Explain why a much lower voltage is normally used. Provide a number of reasons. 2. Relevant equations V=IR P=VI 3. The attempt at a solution The reason a CD player does not operate at 240V is because at 240V there would a lot of power being wasted. Guys, I don't really know how to answer this one. My teacher was telling me today that if theres a high voltage; theres a low amount of current. And if theres a low voltage; theres a high amount of current. This got me all confused, why would a CD player need a lot of current, surely because its a CD player it would only require a small amount of current and therefore would operate 240V.