An electron enters in a magnetic field at an angle less than 90 degrees with magnetic field. Which of the following path is followed by an electron?

Explanation

When an electron enters a magnetic field at an angle less than 90 degrees, its velocity can be decomposed into components: one parallel and one perpendicular to the magnetic field. The perpendicular component of the velocity causes the electron to move in a circular path due to the Lorentz force, while the parallel component causes it to move linearly along the direction of the magnetic field. The combination of these two motions results in a helical path.The option 'Straight' is incorrect because it applies only when the velocity is completely parallel to the magnetic field. 'Circular' is incorrect as this occurs only when the velocity is entirely perpendicular to the field. 'Curve' is partially correct initially but does not describe the continuous motion, which is helical.