Two copper wires A and B have the same weight and the radius of B is half that of A. The ratio Ra/Rb of their resistances is -

Two copper wires A and B have the same weight and the radius of B is h

1.	Two copper wires A and B have the same weight and the radius of B is half that of A. The ratio Ra/Rb of their resistances is -
A.	01-08-2015 12:00:00 AM
B.	01-02-2015 12:00:00 AM
C.	01-01-2016 12:00:00 AM
D.	01-04-2015 12:00:00 AM
Answer» E.