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Hello
I am getting ready to teach circuits in the next week. =20
I was looking at a question that has a battery hooked up to a 5 W bul=
b and then the battery is hooked to a 10 W. It then asks which case =
has the greater current and then which light bulb has the greater res=
istance.
Now comes the silly part.
How does the batter "know" that it is supposed to put out more curren=
t for different lighbulbs? Mathematically it makes sense but concept=
ually it doesn't to me.
I know my students are going to ask me this and I am not wanting to s=
ay cause of the little guy that lives in batteries. =20
Doesn't a battery put the same amount of current out regardless of wh=
at is hooked to it?
Thanks
tina
Tina Fanetti
Physics Instructor
Western Iowa Technical Community College
4647 Stone Ave
Sioux City IA 51102
712-274-8733 ext 1429