Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes_x005F_x000D_

Two metallic wires made from copper have same length but the radius of

1.	Two metallic wires made from copper have same length but the radius of wire 1 is half of that of wire 2. The resistance of wire 1 is R. If both the wires are joined together in series, the total resistance becomes_x005F_x000D_
A.	2R
B.	R/2
C.	5R/4
D.	3R/4
Answer» D. 3R/4