Physics
Physics
Problem
A lamp is used for each day, while a lamp is used for each day. Over a -day month, which statement about their energy consumption is correct? a) The lamp consumes more energy than the lamp. b) The comparison cannot be made without knowing the mains voltage. c) Both lamps consume the same amount of energy over the month. d) The lamp consumes more energy than the lamp.Intuitive explanation
Energy consumption is about how much total work electrical devices do over time—it's power multiplied by duration. The key insight is that a more powerful device doesn't automatically use more energy; you have to account for how long each runs. Calculate the total energy for each lamp over the month by finding daily consumption first, then multiply by 30 days to compare fairly.
Intuitive explanation
Energy consumption is about how much total work electrical devices do over time—it's power multiplied by duration. The key insight is that a more powerful device doesn't automatically use more energy; you have to account for how long each runs. Calculate the total energy for each lamp over the month by finding daily consumption first, then multiply by 30 days to compare fairly.