alleryThe resistance R of a uniform conductor of length l and cross-section A made of material with resistivity ρ is
AR = ρ A / l
BR = ρ l A
CR = ρ l / A
DR = l / (ρ A)
Answer & Solution
Correct answer: C. R = ρ l / A
R = ρ · l/A. Doubling length doubles R; doubling area halves R.
Keep practising Current Electricity
Browse all Current Electricity questions for Karnataka PUC II, or explore more Physics topics.
Related questions
Current electricity numbersThe resistance inside a cell itself is called its:NEET · Physics · Kirchhoff's LawsTap what affects resistanceHalving the cross-section area of a conductor makes resistance:Resistance depends on the material and on the conductor's:The quantity denoted by sigma, the inverse of resistivity, is:Kirchhoff's junction rule for currents I1, I2 into a junction gives: