An electron moving with a velocity
= 5.0 × 107 m/s
enters a region of space where perpendicular electric and a magnetic fields are present. The electric field is
= - 104
. What magnetic field will allow the electron to go through, undeflected?
A)
= + (2.0 × 10-4 T) 
B)
= - (2.0 × 10-4 T) 
C)
= + (2.0 × 10-4 T) 
D)
=- (2.0 × 10-4 T) 
E)
= + (5.0 × 10-4 T) 
Correct Answer:
Verified
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