Resistance

JEE Mains 2015 Online › Electricity and magnetism questions › Resistance

A conductor of length l has a non uniform cross section . The resistivity of the material is Ï.
Assume b-a<<l ,find the resistance of the conductor across its end

#Physics #Electricity and magnetism

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7 Answers

Dharun ·2009-06-19 06:39:26

plz help frnds

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Usha Sree ·2009-06-21 06:36:46

R = \rho l/\pi ab

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Dharun ·2009-06-22 07:56:09

explain ur soln

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Anchal Singhal ·2009-06-22 10:16:11

ÏL/Ï€ab

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eureka123 ·2009-06-22 10:50:37

R=Ï*(length of conductor along which current flows)
(area of cross-section perpendicular to which current flows)

as we know cross section area of elliptic section is Ï€ab

=>R= Ïl
Ï€ab

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Â°áƒ¦â€¢à¹“ÑÏ…Î ·2009-06-23 05:38:48

if u wish u can refer hcv this is a solved eg

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abhinaav sharma ·2009-06-23 06:46:34

this is from hcv .did it two years back

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Basic Integral Calculus Operators Symbols Matrix Cases

√ √ || {} [] () → ~ ^ x x x → → ln log lg lim lim cos sin tan cot arcsin arccos arctan

∫ ∫ ∫ ∫ ∫ ∬ ∬ ∬ ∬ ∬ ∭ ∭ ∭ ∭ ∭ ⨌ ⨌ ⨌ ⨌ ⨌

∑ ∑ ∑ ∑ ∑ ∮ ∮ ∮ ∮ ∮ ∏ ∏ ∏ ∏ ∏ ∐ ∐ ∐ ∐ ∐

+ - × ÷ ± ∓ = ∪ ∩ ≠ ∼ ≈ ∅ ∀ ∃ ∈ ∋ ∝ ≤ ≥ ≃ ≅ ≡ < > ≪ ≫ ⊂ ∉ ⊃ ⊆ ⊇ ⇒ ⇐ ⇔ ⇒ ⇐ ⇔ ⇑ ⇓ ⇕ → ← ↔ → ← ↔ ↑ ↓ ↕ ↖ ↗ ↘ ↙ ↪ ↩ ⇀ ↼ ⇁ ↽

° ∂ ∞ α β γ δ θ λ μ ν ξ π ρ σ φ ω ε ƒ κ τ υ Γ Δ Λ Σ Π Ω

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Resistance

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