An LED lightbulb has an efficiency of 11.5% and a power of 10 W. How much light energy does the lightbulb produce in 1 second?
A. 10 J
B. 1.15 J
C. 8.85 J
D. 3.25 J
To calculate the light energy produced by the LED lightbulb in 1 second, we first need to find the total energy input. The efficiency of 11.5% means that only 11.5% of the input power is converted to light energy, so we need to calculate 11.5% of the input power.
11.5% of 10 W = 0.115 * 10 = 1.15 W
Therefore, the LED lightbulb produces 1.15 J (1.15 W * 1 second) of light energy in 1 second.
The answer is B. 1.15 J.