Homework Help: physics

Posted by taryn on Sunday, February 24, 2013 at 8:05pm.

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.)

physics - bobpursley, Sunday, February 24, 2013 at 8:08pm
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.
physics - taryn, Sunday, February 24, 2013 at 8:40pm
im still not getting it.

Answer this Question

Related Questions

Algebra - The illumination provided by a car’s headlight varies inversely ...
Physics - A car owner forgets to turn off the headlights of his car while it is ...
Physics. - A 15.0- resistor and a 20.0- resistor are connected in parallel. A 5....
physics - A 59.0-Ω resistor is connected in parallel with a 116.0-&...
physics - A 59.0-Ω resistor is connected in parallel with a 116.0-&...
physics - A 65.0-Ù resistor is connected in parallel with a 117.0-Ù...
physics - a 12 Volt car battery supplies 1.0 x 10^3 C of charge to the starter. ...
SCIENCE - Car headlight circuit - is this possible or do I need two separate ...
Physics - 1)Four resistors of 10.0 each are connected in parallel. A combination...
Physics - The resistance of the wire in the windings of an electric starter ...

For Further Reading

First Name:
School Subject:
Answer: