EXPERT/ FRIENDS PLZ. . SOLVE IT = write the corresponding values of x and y for which the lengths of conducters x= 4ohm , y= 48*10-8ohm-m are reduced to half ?
We have a conductor of length say L.
Its resistance is, x = 4 Ω and resistivity is, y = 48 × 10-8 Ωm
Now, when the length is reduced to L/2, the material of the conductor remains the same.
So, y = 48 × 10-8 Ωm
Since, the area of cross-section of the conductor is not changed and only length is change and we know length is directly proportional to the resistance. So, new resistance is, x = 4/2 = 2 Ω