🔍 Key Concepts

• Thermocouple ammeter operation – how it senses current and converts it to a readable value • Shunts vs transformers – how each affects current range in measuring instruments • Effect of capacitors in AC circuits vs DC circuits

💭 Think About

• Think about which devices are commonly used to extend the current range of ammeters in general electrical practice • Ask yourself: does a thermocouple ammeter measure AC, DC, or both, and how does that influence which components are useful? • Consider what each option (transformer, capacitor, resistor) actually does to the current flowing through the measuring element

✅ Before You Answer

• Identify which components are typically used as shunts for ammeters and what a shunt does • Confirm whether a capacitor can safely and accurately carry steady current to extend a measuring range • Recall that a current transformer only works under certain conditions (think AC vs DC) and whether that matches thermocouple ammeter usage