A proton is moving in a plane perpendicular to a uniform magnetic field
PHYSICS · Single correct · AP · Physics 2: Algebra-based · Magnetism and Electromagnetism · Magnetism and Electromagnetism
Problem
A proton is moving in a plane perpendicular to a uniform magnetic field. If its kinetic energy is quadrupled while the magnetic field is kept unchanged, how does the radius of its circular path change?
(a) It becomes four times the original radius, 4r0.
(b) It remains unchanged, r0.
(c) It becomes twice the original radius, 2r0.
(d) It becomes half the original radius, 21r0.