A copper wire X has a resistance R Ω at 20° C. Its length is L m. Its cross-sectional area is A m2.
Another copper wire Y of triple the length as X, and whose cross-sectional area is one-third as that
of X would have a resistance of ____ Ω at 20° C.
Another copper wire Y of triple the length as X, and whose cross-sectional area is one-third as that
of X would have a resistance of ____ Ω at 20° C.
Answers & Comments
Answer:
Consider two copper wires with the same cross-sectional area. Wire A is twice as long as wire B. How do the resistivities and resistances of the two wires compare? CHECK ALL THAT APPLY Wire A and wire B have the same resistance. Wire A has twice the