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Ejercicios resueltos fuerza magn tica y torque

Ejercicios resueltos fuerza magn tica y torque

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FUERZA MAGNETICA Y TORQUE 1. Un cañón de electrones de 15 keV dispara estas partículas horizontalmente hacia una pantalla que se encuentra a una distancia de 35 cm. ¿Cuál es la desviación provocada por la componente vertical del campo magnético terrestre (4.1x10-5 T)?. Suponiendo que cualquier cambio de la componente horizontal de la velocidad es despreciable.  Suponiendo que cualquier cambio de la componente horizontal de la velocidad  La desviación por acción del campo B será: d  vt y 1 2 at  2 y 1  d2  a  2  v2  Fmag  qvB sen902  qvB 1 F y   mag 2 m    d 2  1 qBd 2  2     v  2 mv Calculemos la rapidez del electrón: K elec  mv 2 2  v 2 K elec m 2 K elec 2(15 x103 )(1.6 x1019 )   7.25 x107 m s 31 m 9.1x10 v 1  F  d 2  1 qBd 2 y   mag  2   2  m   v  2 mv y (1.6 x1019 C )(4 x105 T )(0.35 m) 2  5.93 mm 2(9.1x1031 kg )(7.26 x107 m s 2. Se aceleran iones de deuterio a través de una diferencia de potencial de 45kV. Los iones entran a un selector de velocidades en el que la intensidad del campo eléctrico E es de 25k V m (en el selector de velocidades los campos eléctrico y magnético son respectivamente perpendiculares). Luego continúan hacia un campo magnético uniforme que tiene la misma intensidad que el campo B en el selector de velocidad. Determine: a) El radio de la órbita ...
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