BUSINESS ADMINISTRATION
BUSINESS LAW
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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12 years
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17 years
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22 years
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27 years
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Detailed explanation-1: -By October 1879, Edison’s team had produced a light bulb with a carbonized filament of uncoated cotton thread that could last for 14.5 hours.
Detailed explanation-2: -Edison decided to try a carbonized cotton thread filament. When voltage was applied to the completed bulb, it began to radiate a soft orange glow. Just about fifteen hours later, the filament finally burned out. Further experimentation produced filaments that could burn longer and longer with each test.
Detailed explanation-3: -In 1802, Humphry Davy invented the first electric light. He experimented with electricity and invented an electric battery. When he connected wires to his battery and a piece of carbon, the carbon glowed, producing light.
Detailed explanation-4: -While incandescent light bulbs were built to last around 1, 000 hours, the most enduring LED light fixtures have been tested to last as long as 100, 000 hours. On average LED light bulbs will not have to be changed for at least 20 years.