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Answer:
option (a)
Explanation:
Wire 1:
length = 2L
Area = 2 A
Wire 2: length = L
Area = A
As we know that the resistance of a wire is directly proportional to the length of the wire and inversely proportional to the area of crossection of the wire.
Let ρ be the resistivity of the cooper wire.
Resistance of wire 1
R1 = ρ x 2L / 2 A = ρ L / A
Resistance of wire 2:
R2 = ρ x L / A = ρ L / A
As R1 = R2
It means both the wires have same resistance.
Answer:
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Hope this really helps!!! (: