state gov BSSC Laboratory Assistant Mock Test Series 2025 Physics Moving Charges and Magnetism Motion in a Magnetic Field
A proton, an electron, and a Helium nucleus, have the same energy. They are in circular orbits in a plane due to magnetic field perpendicular to the plane. let \(r_p\), \(r_e\) and \(r_{He}\) be their respectively radii, then ,
1
\(r_e > r_p > r_{He}\)
2
\(r_e < r_p < r_{He}\)
3
\(r_e < r_p = r_{He}\)
4
\(r_e > r_p = r_{He}\)