a small doubt of electromagnetism

JEE Advanced Help › Electricity and magnetism questions › a small doubt of electromagnetism

Consider cylindrical region of the magnetic field shown in figure. region 1 and region 2 have magnetic field directed perpendicularly outward and inward respectively . fields are varying with time as
region1 :B=3kt
region 2:B=kt

then r1/r2 such that there is no induced electric field in the region out side magnetic field?
answer with explanation

#Physics #Electricity and magnetism

UP 0 DOWN 0 0 5
Post on FacebookPost anonymously?

5 Answers

Lokesh Verma ·2009-12-13 21:36:37

someone try this.. it is simple!

UP 0 DOWN 0
Post on FacebookPost anonymously?

swaraj jena ·2009-12-14 00:51:34

your answer is wrong asish......the answer is 0.5 .again when induced emf is 0 it is not necessary that flux is 0.it should be constant.recheak it

UP 0 DOWN 0
Post on FacebookPost anonymously?

swaraj jena ·2009-12-23 09:46:08

someone try it

UP 0 DOWN 0
Post on FacebookPost anonymously?

106

Asish Mahapatra ·2009-12-24 00:04:52

induced electric field = 0
=> dÏ†/dt = 0
=> Ï†= consnt (i.e. independent of time)

Now Ï† is given as Ï† = (3kt*Ï€r₁² - kt*Ï€(r₂²-r₁²))
= ktÏ€*(4r₁² - r₂²)

Ï† is constant if coeff of t = 0

i.e. 4r₁² - r₂² = 0

=> r₁/r₂ = 0.5

UP 0 DOWN 0
Post on FacebookPost anonymously?

swaraj jena ·2009-12-24 03:59:12

thx asish

UP 0 DOWN 0
Post on FacebookPost anonymously?

Your Answer

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

Close [X]

a small doubt of electromagnetism

5 Answers

Your Answer

Add Image

Similar Questions