Multiple Choice
An electron is launched with velocity in a uniform magnetic field
The angle between
is between 0 and 90o. As a result, the electron follows a helix, its velocity vector
returning to its initial value in a time interval of:
A) 2πm/eB
B) 2πmv/eB
C) 2πmv sin /eB
D) 2πmv cos /eB
E) none of these
Correct Answer:

Verified
Correct Answer:
Verified
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