What is the resistance of a 30 m length of 2.5mm^2 copper conductor if the resistivity of copper is 0.0178mu Omega /m a 0.01Omega 0.81Omega b 0.21Omega d 421Omega

## Step 1:The resistance of a wire could be figured out by the formula , where is the resistivity of the metal (for copper it's around ), stands for the length, and is the cross-sectional surface of the wire which for this case is directly given.## Step 2:Now, substituting the given values we have taken into concern:### . ## Step 3:Upon simplifying it we could compute that ###