Question

A person is testing three new light bulbs for a bedroom lamp. All light bulbs have the same brightness. They want to identify the light bulb that wastes the least amount of electricity. Which evidence would be most useful to draw this conclusion?

1) The size of each light bulb
2) The amount of electricity used by each light bulb in an hour
3) The total amount of time that each light bulb lasts
4) The mass or weight of each light bulb

Answer 1

The best evidence to identify the light bulb that wastes the least amount of electricity is the amount of electricity used by each light bulb in an hour, as it accurately reflects the power consumption and efficiency.

Step-by-step explanation:

To determine which light bulb wastes the least amount of electricity, the most useful evidence would be the amount of electricity used by each light bulb in an hour. This is because the electricity usage reflects the power consumption, which is measured in watts (W), and directly affects the efficiency and the electrical energy cost. Light bulb sizes, total lifespan, and mass are less indicative of electrical waste when comparing bulbs of the same brightness. Modern solutions like compact fluorescent lights (CFL) and light-emitting diode (LED) bulbs are designed to provide a high luminous flux, or brightness, with lower energy consumption compared to traditional incandescent light bulbs.