defence exam Agniveer Vayu Group X & XY Mock Test 01/2026 Physics Current, Resistance and Electricity Resistance and Resistivity
Two conducting wires A and B are made of same material. If the length of B is twice that of A and radius of circular cross section of A is twice that of B, then their resistance RA and RB are in the ratio
1
2 : 1
2
1 : 2
3
1 : 8
4
1 : 4