Multiple Choice
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 
= 
) What magnetic field will allow the electron to go through the region without being deflected?
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
Correct Answer:
Verified
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