If a 10W light is on for 2 days, how much energy does it consume?

To determine the energy consumption of a 10W light that is on for 2 days, you can use the formula for energy, which is:

Energy (in watt-hours, Wh) = Power (in watts, W) × Time (in hours, h)

First, you need to convert the time from days to hours. Since there are 24 hours in a day, 2 days is equal to:

2 days × 24 hours/day = 48 hours

Now, plug the values into the formula:

Energy = 10 W × 48 h = 480 Wh

This shows that the total energy consumed by the 10W light over the course of 2 days is indeed 480 Wh. This value directly aligns with the correct choice, confirming that option B is accurate. Energy is typically measured in watt-hours, and in this case, understanding how to convert the time from days to hours and applying it to the power rating of the light is essential for solving this problem accurately.