Question

3. Circular Motion in a Magnetic Field See Figure 2. A particle of charge +e and mass m is accelerated from rest by a potential difference V. The particle then enters a region of uniform magnetic field B perpendicular to the velocity. The particle will undergo uniform circular motion. It instead, the charge is doubled and the mass is quadrupled, while keeping both the potential difference and strength of the magnetic field the same, i) how does the radius of orbit now compare to the original (give a ratio), (i) how does the frequency of orbit now compare to the original, and lastly. (iii) how does the kinetic energy now compare to the original?

Answer 1