Match the following (choose the correct alternative).
| I |
II |
| A. Aston’s mass spectrograph |
i. Relativistic variation of mass has no effect |
| B. Magnetron |
ii. Relativistic variation of mass limits the maximum velocity |
| C. Betatron |
iii. Radial electrical field and axial magnetic field |
| D. Cyclotron |
iv. All particles with same value of e/m brought to a single focus |
