🔍 Key Concepts

• DC shunt field circuits and how current normally flows through field coils • Effect of a shorted turn or coil on voltage drop and impedance • Difference between tests intended for armatures (like a growler) vs tests aimed at field windings

💭 Think About

• Which method lets you compare each shunt field coil under identical conditions without disconnecting everything? • Which option is mainly used to check armatures rather than field windings? • Which technique would most clearly show that one coil has less impedance (because it is partially shorted) than the others?

✅ Before You Answer

• Identify which choice specifically measures and compares conditions across each field coil in the shunt circuit. • Eliminate any method that is primarily for armature testing instead of field windings. • Consider which test would make a shorted field coil stand out by showing an abnormally low voltage or impedance compared with the others.