🔍 Key Concepts

• Load impedance in a vacuum tube (what circuit element it usually represents) • Relationship between plate (anode) current and useful output (voltage or power) • How changing load impedance relative to internal plate impedance affects output, not just a definition of 'load'

💭 Think About

• When technicians say a tube is 'loaded,' what physical part of the external circuit are they usually talking about? A resistor? A transformer winding? Something else? • Does the definition of 'load' normally include how it behaves as it changes value, or is that a separate performance characteristic? • If one choice clearly defines what load is, and another describes how performance changes as impedance values get closer, are both truly part of the standard meaning of 'load'?

✅ Before You Answer

• Identify which option gives a basic definition of load in terms of the circuit element carrying plate current to the output. • Decide whether a statement about how load impedance changes with respect to internal plate impedance is a definition, or a behavior/condition. • Before choosing a combined answer like C, verify that both A and B accurately describe what is meant by 'load' itself, not just related performance effects.