# Basic Electricity

Discussion in 'Homework Help' started by 55bulldog, Dec 26, 2008.

1. ### 55bulldog Thread Starter New Member

Dec 26, 2008
3
0
What is the total resistance in a circuit having 3 feet of 10-ohm/ft wire, with two 15-ohm resistors wired in parallel? I used the formula; Rtotal=R1XR2/R1+R2 & got 7.5ohms. 7.5ohms is not one of the choices for an answer. I went back over the text & did not find anything to help find another answer. I am not sure how nor if the wire length & resistance should figure into the problem solving.

Last edited: Dec 26, 2008
2. ### 55bulldog Thread Starter New Member

Dec 26, 2008
3
0
A Little Help?

Apr 5, 2008
15,521
2,299
4. ### beenthere Retired Moderator

Apr 20, 2004
15,815
282
Don't forget that there is a series resistance in circuit - something about that wire having several ohms/foot.

5. ### 55bulldog Thread Starter New Member

Dec 26, 2008
3
0
Thanks for the help. I will try to change my posting so that the time stamp will show.

6. ### Wendy Moderator

Mar 24, 2008
20,735
2,498
Hint: 3 ft of 10Ω/ft wire is how many ohms?