A cathode ray tube is excited by a small tesla coil mounted on a ring stand. The cathode rays are narrowed to a beam by a slit and run along a fluorescent screen. A magnet can deflect the beam by directing the field horizontally and perpendicular to the beam.
Warning: soft x-rays are emitted from this device. Keep the excitation voltage as low as possible to keep the x-rays soft.
Questions:
How would you position a horse-shoe magnet to maximize the deflection?
How would you hold a bar magnet to maximize the deflection?
