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Science homework help?
"A stereo needs 200 watts of power, and you know your house provides 120 volts of AC electricity. How much current does the stereo draw?"
"How much resistance does the stereo give to the charges in the wire?"
"If the fuse on your circuit breaker can only take 10 amps, will plugging in your stereo blow the fuse if you also plug in your disco ball that draws 60 watts of power?"
1 Answer
- ?Lv 77 years agoFavorite Answer
"A stereo needs 200 watts of power, and you know your house provides 120 volts of AC electricity. How much current does the stereo draw?"
P = VI ... I = P/V ... I = 200/120 = 1.6667 amperes
"How much resistance does the stereo give to the charges in the wire?"
V = IR ... R = V / I = 120 / 1.66667 = 72 ohms.
"If the fuse on your circuit breaker can only take 10 amps, will plugging in your stereo blow the fuse if you also plug in your disco ball that draws 60 watts of power?"
60 + 120 = 180 watts
I = P/V = 180/120 = 1.5 amperes ... no will not blow the fuse.