Teaching UKPSC Lecturer Mock Test Series 2024 Physics Current, Resistance and Electricity Resistance and Resistivity
A wire of resistance R1 is drawn out so that its length is increased by twice of its original length. The ratio of new resistance to original resistance is :
1
9 ∶ 1
2
1 ∶ 9
3
4 ∶ 1
4
3 ∶ 1