Question

a wire of resistance R is cut into five equal pieces least five features of wires are then connected in parallel the resultant resistance of the combination BR then the ratio of the resultant to the original will be​

Answer 1

Answer:

Resistance of a piece of wire is proportional to its length. A piece of wire has a resistance R. The wire is cut into five equal parts. Therefore, resistance of each part =R/5  

All the five parts are connected in parallel.  

∴equivalent resistance (R') is given as  

1/R'=5/R+5/R+5/R+5/R+5/R

     = 5+5+5+5+5/R

1/R'=25/R

R/R' = 25