A certain wire has resistance R.Another wire, of the same material, has half the length and half the diameter of the first wire.The resistance of the second wire is:
A)R/4
B)R/2
C)R
D)2R
E)4R

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The Answer of A certain wire has resistance R.Another wire, of the same material, has half the length and half the diameter of the first wire.The resistance of the second wire is:
A)R/4
B)R/2
C)R
D)2R
E)4R

A Certain Wire Has Resistance R