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

Question

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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