The apparatus in the figure consists of two parallel plates shown on edge) and a large magnet not shown) . The field of the magnet is uniform, perpendicular to the electric field between the plates, and directed into the plane of the paper. The magnitude of B is 0.40 T. Charged particles with speeds of 5.0 × 105 m/s enter this region through the slit at the left and emerge through the exit slit at the right. What magnitude and direction must the E field have so that positively charged particles entering from the left will traverse to the exit slit undeviated?
A) 2.0 × 105 V/m up
B) 2.0 × 105 V/m down
C) 1.2 × 106 V/m down
D) 1.2 × 106 V/m up
E) 2.4 × 106 V/m down
Correct Answer:
Verified
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