nursing UP CNET BSc Nursing 2025 Mock Test Series Physics Current, Resistance and Electricity Resistance and Resistivity
Two wires are of same material and same length. Their radii are r and 2r respectively. The ratio of their specific resistances is
1
1 ∶ 2
2
2 ∶ 1
3
1 ∶ 1
4
4 ∶ 1