The resistance of the second wire is 2R.
What is Resistance ?
The opposition to current flow in an electrical circuit is measured by resistance, also known as ohmic resistance or electrical resistance. The Greek letter omega represents the unit of measurement for resistance, known as ohms.
The barrier to current flow increases as resistance increases.
D stands for the wire's diameter, or thickness. Using RL/A, we observe that 1/4D2 D2.
The second wire's resistance is determined by
R2= R(A1/A2)(L2/L1) = R(D1/D2)^2 (L2/L1) = R(2)^2(1/2) = 2R
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