Question You have three identical lights that you need to connect to your car battery with V=13.8. Each light can be considered to be a simple resistor. When 1 light is connected to the battery, it uses 20 W of power. a) How much power will be used if the three lights are all connected in parallel and connected to the battery? Number W. b) How much power will be used if the three lights are connected in series and connected to the battery? Number W.

I9RTRC The Asker · Physics

Transcribed Image Text: You have three identical lights that you need to connect to your car battery with V=13.8. Each light can be considered to be a simple resistor. When 1 light is connected to the battery, it uses 20 W of power. a) How much power will be used if the three lights are all connected in parallel and connected to the battery? Number W. b) How much power will be used if the three lights are connected in series and connected to the battery? Number W.
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Transcribed Image Text: You have three identical lights that you need to connect to your car battery with V=13.8. Each light can be considered to be a simple resistor. When 1 light is connected to the battery, it uses 20 W of power. a) How much power will be used if the three lights are all connected in parallel and connected to the battery? Number W. b) How much power will be used if the three lights are connected in series and connected to the battery? Number W.
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G4LXYZ

Given thatBattery voltage v=13.8 voltsPower consumed by each light is 20 wattLet R_(1),R_(2),R_(3) are the resistances of each bulbThen total power consumed is given by (a).When three lights are connected in parallelThen total reciprocal of resistance{:[(1)/(R_(eq))=(1)/(R_(1))+(1)/(R_(2))+(1)/(R_(3))],[" From "],[P=(v^(2))/(R_(eq))],[P=V^(2)[(1)/(R_(1))+(1)/(R_(2))+(1)/(R_(3))]],[P=(v^(2))/(R_(1))+(v^(2))/(R_(2))+(v^(2))/(R_(3))],[P=P_(1)+P_(2)+P_(3)],[P=20+20+20],[P=60 watt]:}Since, three lights are identicalPower consumed when connected in parallel is 60W(b).When three lights are conne ... See the full answer