Claim: Changing the current and the number of loops of wire in the electromagnets affected the strength and direction of the particle beam in the Cathode Ray Tube (CRT).
Evidence: When I increased the current in the electromagnet, the particle beam moved more strongly, showing that a higher current makes the magnet work better. When I added more loops of wire, the particle beam also moved more, indicating that more loops make the magnetic field stronger. In tests, I noticed that with fewer loops and lower current, the beam still moved, but not as much. Therefore, fewer loops and lower current made the magnet weaker.
Reasoning: This happens because the electromagnet's strength depends on both the current and the number of loops. When there is more current or more loops, there are more magnetic lines of force, which pull on the particles in the beam more effectively. To use the least amount of current to calibrate the CRT, I found that using fewer loops allowed me to reduce the current without losing too much control over the particle beam. This means I could still make the beam move enough to calibrate it, using less energy.