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anonymous
 one year ago
You plug a string of 100 lights in series into a 120 V power outlet, and each light has a resistance of 3.00 Ω. If each light has a power rating of 0.50 W, what will happen?
A. All the lights will go out.
B. Only one light will go out.
C. The string will remain lit.
D. You cannot predict what will happen.
anonymous
 one year ago
You plug a string of 100 lights in series into a 120 V power outlet, and each light has a resistance of 3.00 Ω. If each light has a power rating of 0.50 W, what will happen? A. All the lights will go out. B. Only one light will go out. C. The string will remain lit. D. You cannot predict what will happen.

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Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2the total resistance is: 3*100=...ohms

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2ok! so the current is: I=120/300=...amperes

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2now the maximum current which can flow into each of the bulbs, is: I=W/R^2= 0.5/9=...amperes

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0what does that mean? the lights will remain lit? :/

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2so, since 0.4>0.055, namely the current provided by the battery is greater than the maximum current which can flow into each bulb, wha can you conclude?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0ermm the string of lights will remain lit?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2sorry, I have made an error, the maximum current which can flow into each of the bulbs, is: \[I = \sqrt {\frac{W}{R}} = \sqrt {\frac{{0.5}}{3}} = ...\]

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2so, since 0.4<0.408, namely the current provided by the battery is less than the current which can flow into each bulb, what can you conclude?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0that means that all the lights will go out? choice A?

Michele_Laino
 one year ago
Best ResponseYou've already chosen the best response.2yes! that's right!
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