A copper wire of radius r and length lhas a resistance of R. A second copper wire with radius 2r and length lis taken and the two wiresÂ areÂ joinedÂ inÂ aÂ parallelÂ combination. TheÂ resultantÂ resistanceÂ Â ofÂ theÂ parallel combination of the two wires will be

A copper wire of radius r and length lhas a resistance of R. A second

1.	A copper wire of radius r and length lhas a resistance of R. A second copper wire with radius 2r and length lis taken and the two wiresÂ areÂ joinedÂ inÂ aÂ parallelÂ combination. TheÂ resultantÂ resistanceÂ Â ofÂ theÂ parallel combination of the two wires will be
A.	5 R
B.	5 R/4
C.	4 R/5
D.	R/5
Answer» E.