2.5 points Save Answer QUESTION 2 Which device, a light bulb of power rating 100
ID: 2291082 • Letter: 2
Question
2.5 points Save Answer QUESTION 2 Which device, a light bulb of power rating 100W and a laptop computer of 20W, requires greater electric current for normal operation? The operation voltage of the bulb is 120v The operation voltage of the laptop is 20v o The bulb requires greater electric current o The computer requires greater electric current o They require the same electric current. O More information is needed to answer this question. Question Completion Status. 2.5 points Save Answer QUESTION 3 A USB charger's output power is 8.1W. When plugped in a household outilet (household voltage is 120V in the USA), what is the maximum electric current (in unit of mal) the charger can draw i t is an efficient charger? A device is considered efficient if its efficiency exceeds 80%.Explanation / Answer
opearating current for bulb=P/V=100/120=0.834A
opearating current for laptop=P/V=100/20=5A
Hence laptop requires or computer requires more correct.
Hence second option is correct.
Maximum current that can be drawn = P/v=120/8.1=14.814A
Hence required answer is 14.814A
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