- #1
ScoutFCM
- 17
- 0
Just wanted to see if anyone could check my work. I only have 1 opportunity to do this. Thanks yall!
1.) Suppose that you wish to fabricate a uniform wire out of 1.00g of copper. If the wire is to have a resistance of R=.5Ω and if all of the copper is to be used, what will be (a) the length and (b) diameter of this wire?
a) L = [(1 x 10^-3)(.5)/(8.92 x 10^3 x 1.7 x 10^-8)]^1/2 = 1.82m
b) D = 2 (6.19 x 10^-8 / ∏ ) ^1/2 = 2.8 x 10^-4 m
2) The power supplied to a typical black-and-white television set is 90W when the set is connected to 120V. (a) How much electric energy does this set consume in one hour? (b) A color television set draws about 2.5A when connected to 120V. How much time is reuiqred for it to consume the same energy as the black-and-white model consumes in one hour?
a) E = 90x3600= 3.24 x 10^5 J = .09kWh
b) = R = 6.25 x 48 = 300 W 3.24 x 10^5 = 300t
t = 1080sec = 18min
1.) Suppose that you wish to fabricate a uniform wire out of 1.00g of copper. If the wire is to have a resistance of R=.5Ω and if all of the copper is to be used, what will be (a) the length and (b) diameter of this wire?
a) L = [(1 x 10^-3)(.5)/(8.92 x 10^3 x 1.7 x 10^-8)]^1/2 = 1.82m
b) D = 2 (6.19 x 10^-8 / ∏ ) ^1/2 = 2.8 x 10^-4 m
2) The power supplied to a typical black-and-white television set is 90W when the set is connected to 120V. (a) How much electric energy does this set consume in one hour? (b) A color television set draws about 2.5A when connected to 120V. How much time is reuiqred for it to consume the same energy as the black-and-white model consumes in one hour?
a) E = 90x3600= 3.24 x 10^5 J = .09kWh
b) = R = 6.25 x 48 = 300 W 3.24 x 10^5 = 300t
t = 1080sec = 18min