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Examen de electrotecnia UMSA/UNAM

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examen de electrotecnia

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PARTE PRACTICA : 19/01/2022

1.- ( 15 % ) Un protón realiza una trayectoria circular de radio 1 (m ) a) Que campo
magnético seria requerido para este movimiento si el protón adquiere una energía
cinética de 200 eV ( electronvoltio ) b) Determine la frecuencia angular del protón.

2.- ( 20 % ) El circuito muestra inductores conectados en serie y paralelo : a) Determine
la L EQUI = ? b) Determine la ɛ que induce al circuito de inductores si por el circula
una corriente I = 10 ( A ) para un tiempo de t 0 = 2 (s ) a t 1 = 4 (s)
DATOS: L1=2 ; L2= 4 ; L3 = 8 ( todo en H y )

3.- ( 20 % ) La fig muestra inductores opuestos en paralelo conectados a otra bobina,:

a) Determine LEQUI = ? b) La ɛ inducida al circuito si por el circula una corriente
3 2
I = t - 2 t + 4t para un tiempo de t =0, 2 ( s ) DATOS: L1 = 3 ; L 2 = 4 ; L 3 = 6
M 1 = 2 ; M 2 =1 (todo en Hy )




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