Question

# Which among the following equations give the correct relation between Resistance(R), length of conductor(L), Area of cross-section of the conductor(A) and resistivity (ρ)?R=LA×ρR=A×LρR=A×ρLR=ρ×LA

Solution

## The correct option is D R=ρ×LAResistance of the conductor depends (i) on its length, (ii) on its area of cross-section, and (iii) on the nature of its material. Measurements have shown that resistance of a uniform metallic conductor is directly proportional to its length (L) and inversely proportional to the area of cross-section (A). RαLRαLAR=ρ×LA

Suggest corrections