🔍 Key Concepts

• Magnetron construction: location of cathode and anode and which part is usually connected to the high-voltage supply • Electron flow and attraction: which element must be at a high potential relative to the cathode to pull electrons across the gap • Equipment safety and shielding: in high‑power RF devices, what is usually tied to the chassis or metal housing

💭 Think About

• Picture a cross‑section of a magnetron: where is the heated cathode located, and how do electrons move from it? • In most high‑voltage vacuum tubes, which element is normally tied to the metal chassis or case, and why? • If one electrode is at several kilovolts, which one is usually made the ‘hot’ high‑voltage part: the central element or the outer block?

✅ Before You Answer

• Confirm which electrode (cathode vs anode) must be highly positive to attract electrons from a heated cathode. • Decide which electrode is usually connected to the metal chassis/ground in high‑power RF equipment and why that improves safety. • Check whether higher peak‑power ratings mainly depend on voltage/current design or on whether the anode happens to be at ground potential.