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Chemical Engineering Basics

Q1: Resistance of an electrical conductor is proportional to its (where, l = length and A = cross-sectional area of the conductor)

A A

B l'

C A2

D both 'a' & 'b'

ANS:D - both 'a' & 'b'

The resistance of an electrical conductor is proportional to its length (l) and inversely proportional to its cross-sectional area (A). Therefore, the correct option is b) l. This relationship is described by the formula for electrical resistance: R=ρ⋅l​/A Where:

  • R is the resistance of the conductor,
  • ρ (rho) is the resistivity of the material,
  • l (length) is the length of the conductor, and
  • A (cross-sectional area) is the area of the conductor's cross-section.
From this formula, you can see that resistance is directly proportional to the length (l) and inversely proportional to the cross-sectional area (A) of the



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