🔍 Key Concepts

• Secondary emission in vacuum tubes • How a dynatron oscillator uses a tetrode’s characteristics • Difference between positive and negative resistance behavior in a tube

💭 Think About

• Which part of the tube’s behavior can create a region of negative resistance, allowing oscillation? • How does the anode (plate) current respond when its voltage is varied in a dynatron setup? • Among the choices, which specifically relates to electrons leaving the anode surface rather than just being collected by it?

✅ Before You Answer

• Identify which option clearly refers to electrons being re‑emitted from the anode surface. • Recall that a dynatron oscillator relies on an effective negative resistance region in the tube’s characteristic curve. • Verify which options describe normal tube conduction versus the special emission effect needed for dynatron action.