CBSE Class 10 Answered

Resistance of one of the first wire is R, therefore the resistance of the other wire is also R.

Series connection means equivalent resistance = R₁ + R₂

Therefore, equivalent resistance series connection = 2 R (since R1 and R2 are equal)

Now in parallel connection, the equivalent resistance = 1 /R₁ + 1/R₂

                                                                          = R/2

So their relation here means ratio that is = 2/(1/2)

                                                          = 4:1