Recent content by jsantor1

thank you...

hmm that worked..do u know why my calculator is not computing these correctly?

That's what I'm using as well, getting a new resistance of .04824 and then getting a potential difference of 241.24mV which is coming out wrong for some reason

well my answer is correct according to the book...the value for the resistivity of copper I am using is 1.7E-8

anyone?...

The first part you use R= resistivity* L/A. This gives you the resistance and with the currecnt use V=IR to solve for potential difference...

So the problem I am working on is.. A 100 cm long copper wire of radius 0.45 cm has a potential difference across it sufficient to produce a current of 5.0 A at 20°C. Find a) What is the potential difference. b) If the temperature of the wire is increased to 200°C, what potential difference is...