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    				| 1. | 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» Correct answer is (b) 1: 3 | |