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QCM RMN


Go to solution Solved by virasolelh,

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  • Solution
Posted

hola @Ilyana31 !

il faut que tu utilise la formule 

phi (angle en radian) = omega1 (la vitesse angulaire après impulsion) x t (le temps d'impulsion)

tu manipules un peu et tu te retrouves avec :

t = phi/omega1

or :

- phi = 180° = pi radians

- omega1 = gamma x B1 = 26,75.107 x 3,14 x 10-3

d'où :

t = 3,14/26,75.107 x 3,14 x 10-3 = 3,7 µs

la E est vraie :))

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