It has been proposed to use large inductors as energy storage devices. (a) How much electrical energy is converted to light and thermal energy by a 150-W light bulb in one day?

Video transcript

Hey, everyone. So this is a pretty straightforward electrical energy and power problem. Let's see what they're asking us. We need to determine the electrical energy delivered to a device over a time of 10 hours when that charging adapter is rated at 25 watts. Our multiple choice answers here are a 250 Jews B 25 Jews C nine times 10 to the five Jews or D nine times 10 to the four Jews. So we can recall that our energy equation in terms of power is P equals P power multiplied by t time. And so we're given the power and the time they're asking us for the energy. So we don't need to rearrange the equation at all. Our power is 25 watts. Our time is 10 hours. We do need to make sure that that is in standard units. So we're going to use the conversion factor seconds per hour and then we can solve there because our standard units for time are set. So when we solve that, we get nine times 10 to the fifth jewels, and that is the answer to this problem that aligns with answer choice. C, so that's all we have for this one. We'll see you in the next video.