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annale purpan 2016 RMN


Go to solution Solved by PASSnavigo,

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  • Solution
Posted

Salut, 

Pour ce qcm tu va utiliser la formule

- ψ = Δt*γ*B1

- Δt = ψ/γ*B1

Données :

90° = π/2 radian

γ =26.75*10⁷

B1=(π/2)*10-⁴

 

Δt = (π/2)/(π/2)*10-⁴*26.75*10⁷ 

= 1/(26.75*10³) ≈ 1/30* 10-³ = 0.033*10-³ = 33*10-⁶ = 33 μs

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