Teaching UP PGT Mock Test Series 2024 Physics Current, Resistance and Electricity Resistance and Resistivity
The resistivity of a current-carrying conducting wire is p. If the wire is doubled in length and its area of cross-section is reduced by half, the new resistivity is:
1
half that of the old value
2
double that of the old value
3
four times that of the old value
4
same as the old value