Question

A charged particle enters in a magnetic field $H$ with its initial velocity making an angle of $45^{\circ}$ with $H$. The path of the particle will be

• A. an ellipse
• B. a straight line
• C. a circle
• D. a helical

Answer 1

Answer: (D)

a helical

Answer 2

The component of velocity perpendicular to $H$ will make the motion circular while that parallel to $H$ will make it move along a straight line. The two together will make the motion helical.