Two wires A and B of same metal are connected in parallel. Wire A has length and radius V and wire B has a length ‘2l’ and radius ‘2r’. Then the ratio of total resistance of parallel combination and the resistance of wire A is
A. 1: 2
B. 1: 3
C. 1: 4
D. 1: 5
Answer:B
Two wires A and B of same metal are connected in parallel. Wire A has length and radius V and wire B has a length ‘2l’ and radius ‘2r’. Then the ratio of total resistance of parallel combination and the resistance of wire A is
A. 1: 2 B. 1: 3 C. 1: 4 D. 1: 5