The "efficiency" of a light bulb is the ratio of the:
A) heat plus electricity produced to the electrical input
B) voltage output of the bulb to the power input
C) energy into the bulb to the energy out of the bulb
D) light output to the electrical energy input

Question

Quizplus · Accepted Answer

The efficiency of a light bulb is defined as the ratio of the light output to the electrical energy input. This is because the primary function of a light bulb is to produce light, and not heat or other forms of energy. Therefore, the best choice is (D) light output to the electrical energy input.

The "Efficiency" of a Light Bulb Is the Ratio of The