ow suppose that, during a certain period of time, 50 J of energy transferred int
ID: 1878152 • Letter: O
Question
ow suppose that, during a certain period of time, 50 J of energy transferred into the bulb (via t are he electric circuit interaction), while 4 J of energy are transferred out via light interactions with the various light receivers Use this information to calculate the efficiency of the bulb. During the same time period, how much energy do you think is transferred out from the bulb to the surroundings via heat interactio Show your calculations or otherwise explain your reasoning. (Hint Remember that 50 J of energy was input, and that energy cannot be created or destroyed!)Explanation / Answer
for the efficiency
efficiency of light bulb = useful energy output/energy input
efficiency of light bulb = 4/50
efficiency of light bulb = 0.08 = 8 %
the efficiency of light bulb is 8 %
===========================
as energy input = energy lost to surroundings + light output
50 = energy lost to surroundings + 4
energy lost to surroundings = 46 J
the energy lost to surroundings is 46 J
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