Question

A wire is cut into 3equal parts and then connected in parrallel.how will its resistance and resistivity get affected​

Answer 1

Answer:

Explanation: as the area increases and resistance decrease

and length also decrease hence resistance decreases

Answer 2

Answer:

Resistivity depends on the material. Sothis doesn't change .

If the initial resistance is R then each piece has a resistance equal to R/3 now

if we connect each piece in parallel then the new resistance is

1/R' = 3/R + 3/R + 3/R

implies

R' = R/9