Asked by taryn
Your car's 31.5 W headlight and 2.15 kW starter are ordinarily connected in parallel in a 12.0 V system. What power would one headlight and the starter consume if connected in series to a 12.0 V battery? (Neglect any other resistance in the circuit and any change in resistance in the two devices. Answer to the nearest 0.1 W.)
Answers
Answered by
bobpursley
figure the resistance of each first R=power/12
then in series, add the resistances, and then power=12^2/Rt
This is acually ignoring a lot of characteristics of motors, as in the motor, effective resistance is not a constant, but depends on the voltage applied, and how fast the motor is turning and developing back EMF. But ignore all this for now.
then in series, add the resistances, and then power=12^2/Rt
This is acually ignoring a lot of characteristics of motors, as in the motor, effective resistance is not a constant, but depends on the voltage applied, and how fast the motor is turning and developing back EMF. But ignore all this for now.
Answered by
taryn
im still not getting it.
There are no AI answers yet. The ability to request AI answers is coming soon!