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In which direction does a magnetic force act on an electron that is moving in the positive xdirection in a magnetic field pointing in the positive zdirection?
A) any direction in the xyplane
B) the negative ydirection
c) the negative xdirection
D) the positive ydirection
a particle with charge q is at rest when a magnetic field is suddenly turned on. The field
points in the zdirection. What is the direction of the net force acting on the charged particle?
a) In the zdirection.
b) There is no force on the particle.
c) In the y direction
d) In the x direction
 one year ago
 one year ago
In which direction does a magnetic force act on an electron that is moving in the positive xdirection in a magnetic field pointing in the positive zdirection? A) any direction in the xyplane B) the negative ydirection c) the negative xdirection D) the positive ydirection a particle with charge q is at rest when a magnetic field is suddenly turned on. The field points in the zdirection. What is the direction of the net force acting on the charged particle? a) In the zdirection. b) There is no force on the particle. c) In the y direction d) In the x direction
 one year ago
 one year ago

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imron07Best ResponseYou've already chosen the best response.1
The direction of magnetic force is the same as vextor v x B direction. It follows right hand rule, so postive x X positive z = negative y direction. F=qE. The force direction follows magnetic field E direction. Hence a)
 one year ago

ghaziBest ResponseYou've already chosen the best response.2
\[F=q*(V*B)\] take the cross product of the movement of electron and applied magnetic field
 one year ago

AERONIKBest ResponseYou've already chosen the best response.0
there is no force acting on the particle in the second question as the magnetic force acts only on those particles which are in motion.
 one year ago

imron07Best ResponseYou've already chosen the best response.1
@AERONIK : the magnetic force is changing (from zero then turned on).
 one year ago

zhiyuan3yu5Best ResponseYou've already chosen the best response.0
i did the right hand rule for the first one and got neg y as well. for the 2nd question, is it b? no net force?
 one year ago

NinalynnBest ResponseYou've already chosen the best response.0
Actually yes I think its B
 one year ago
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