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1. |
When an electron moving with a uniform speed in a vacuum enters a magnetic field in a direction perpendicular to the field the subsequent path of the electron is |
A. | A straight line parallel to the field |
B. | A parabola in a plane perpendicular to the field |
C. | A circle in a plane perpendicular to the field |
D. | A straight line along its initial direction |
Answer» D. A straight line along its initial direction | |