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 ___________________?
Aa parabola in a plane perpendicular to the field
Ba circle in a plane perpendicular to the field
Ca straight line along its initial direction
Da straight line parallel to the field
Correct answer
B. a circle in a plane perpendicular to the field
Explanation
a circle in a plane perpendicular to the field is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.