An apparatus shown constists of a pair of charge parallel plates (shown edge-on)

Question

An apparatus shown constists of a pair of charge parallel plates (shown edge-on) in a uniform magnetic field of 1.50 T, directed perpendicular to the electric field between the plates, "inward" with respect to this paper. An electron traveling at 5.00 x 10^6 m/s enters the device through a slit at the left and traverses without deviation to emerge from the exit slit at the right.

a) find the direction and magnitude of the electric field between the plates

b)suppose the particle is a proton, entering with the same velocity. Please find the direction and magnitude of the electric field between the plates.

Explanation / Answer

a) Electric field in in downdard direction

E=v*B=7.5 E6 N/C

b) it doenot make a different what is the magnitude or sign of the charge

even for Proton

E=7.5 E6 N/C

and direction in downward

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