Which has a greater resistivity?
1. A copper rod that is shaped like a rectangular prism with dimensions of 1cm x 1cm x 1000m
2. A copper rod that is shaped like a solid cylinder with diameter 1cm
and length 1000m
I think it should be the rectangular prism because it has a greater area. Is this right?
Or do they both have the same resistivity?
3 answers
The skinnier the wire is the greater its resistance. The fatter it is, the less the resistance.
What about for resistivity though?
the resistivity of the copper is constant
1 answer