Question

An electron gun fires electrons into a magnetic field directed straight downward. Find the direction of the force exerted by the field on an electron for each of the following directions of the electron's velocity: (a) horizontal and due north; (b) horizontal and 30^o west of north; (c) due north, but at 30^o below the horizontal; (d) straight upward.

*Is it possible to send a video of you doing the right hand rule? I don't get it.

Answer 1

Answers :

the direction of the force exerted by the field on an electron will be :

(a) horizontal and due north : East

(b) horizontal and 30^o west of north : 60^o East of North

(c) due north, but at 30o below the horizontal : East

(d) straight upward : No force.

According to Right hand rule : If you point your pointer finger in the direction of velocity of the positive charge, and then your middle finger in the direction of the magnetic field, your thumb points in the direction of the magnetic force. When you’re dealing with negative charges—like moving electrons—the force points in the opposite direction as your thumb.

** Sorry!. But, it is not possible to send a video on this platform.