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TD RMN


PACESs
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Bonjour ! 

Je me rend compte en refaisant le TD de RMN que je ne comprends pas comment trouver à partir de 26,75 x 10^4 = 3,7µs ? 

(Je comprends le calcul en lui même mais pas la conversion pour trouver l'item E vrai) 

Voici le qcm si qqn veut bien m'aider svp🙂 

https://www.casimages.com/i/201210084456333408.png.html

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Bonsoir @nninasc

il y a 9 minutes, nninasc a dit :

comment trouver à partir de 26,75 x 10^4 = 3,7µs ? 

En fait on a Δt = 1/[26,75x104]

Je t'ai repris le calcul pour que ce soit plus clair

On a φ=γ BΔt

<=> Δt = φ / (γ B1)

<=> Δt =π / [ 26,75 x 10 x 3,14 x 10-3]

On simplifie et il nous reste donc : Δt = 1/[26,75104] = 0,037 x 10-4 = 3,7µs

Bonne soirée ! 

 

Edited by SBY
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