Physics crossed fields magnetic fields?
I understand how tod o the question the E field is directed toward the bottom plate (neg) the electrostatic force Fe is upward since the electroin is moving toward the pos plate upward and the Fb has to be downward -j didrction to balance out the force.
HOW DO YOU FIND THE DIRECTION OF THE MAGNETIC FIELD B, WHY IS IT IN -K DIRECTION INTO THE PAPER?
I know that Fb=qv cross B well we want to find the diretion of the B not Fb, right? since we know Fb is in -j direction and v is in i diretion so I dont get it, how can you use right hand rule to find the direction of B? i though you use right hand rule to find direciton of Fb?
explain and shwo steps