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Why cannot we use the ampere's circuital law while finding the magnetic field of a wire of finite length? Though we can very easily use it when the wire is of infinite length.

#Physics #Electricity and magnetism

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Subash ·2009-03-09 19:12:19

http://targetiit.com/iit_jee_forum/posts/highly_conceptual_2457.html

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Subash ·2009-03-09 19:12:36

same question

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msp ·2009-03-09 20:17:31

i think the magnetic field shud be like this

and the field is not uniform

the magnetic induction is not constant and so we cant find the magnetic induction by using ampere's law

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eureka123 ·2009-03-09 20:18:16

sanky it was already answered in that post ........go to link as given in post#2

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msp ·2009-03-09 20:25:03

just wanted to check whether i am rite or rong

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Aakash Sharawat ·2009-03-10 19:25:06

yeah this is true because of the phenomenon called fringing of magnetic field!

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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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SIMPLE YET IMPORTANT

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