Question

A 14.5
metal wire is cut into three equal
pieces that are then connected side by side to
form a new wire the length of which is equal
to one-third the original length.
What is the resistance of this new wire?
Answer in units of
.

Answer 1

area has been increased by three, lessens resistance by 1/3
length has been shortened by three, so resistance is cut another 1/3

1/9 original resistance.