Pregunta: 19. Un ion se mueve a través de un campo magnético B y un campo eléctrico E(E⊥B) y se movimiento es perpendicular a estos. Su velocidad tiene que ser igual a: a. EB b. E/B c. B/E d. B/E2 20. Dos cables paralelos conducen corrientes eléctricas en la misma dirección. Entonces: a. Los cables se atraen mutuamente b. Los cables se repelen mutuamente c. El torque

19. An ion moves through a magnetic field B and an electric field E (E 1 B) and moves perpendicular to these. Its speed has to be equal to: À. B. C.

A.EB

B.E/B

C.B/E

D. B/E^2

20. Two parallel wires conduct electric currents in the same direction. So: Cables attract each other.

A.Cables attract each other.

B.The cables repel each other.

C.The torque acts on them so that they rotate and are placed perpendicularly.

D.There is no force or torque on the cables.

Problems

1-Does an electron travel at a speed of 2.0 x 10? M/ in a plane perpendicular to a magnetic field of 0.010 T. Determine the trajectory of its orbit, the period and the frequency of the rotation.