🔍 Key Concepts

• Electromotive force (EMF) is a voltage, not a current • Inductive circuits (motors, coils) can generate a voltage that opposes the source • The difference between a voltage and a current in circuit terminology

💭 Think About

• Is EMF defined as a voltage or as a current? Look at the units used in textbooks and formulas. • When a motor or inductor is running, what kind of quantity is produced that opposes the applied source—voltage or current? • Re‑read each choice: which ones incorrectly mix up current and EMF as if they were the same type of quantity?

✅ Before You Answer

• Verify that EMF stands for a form of voltage (potential difference), not current. • Check which options use EMF consistently as a voltage and not as a current. • Confirm that “back” in back EMF refers to something that opposes the applied source in the circuit.