V. State questions to the underlined words:
1. Voltage may be changed by a transformer. (transformer)
2. Transformers change voltage through electromagnetic induction. (Transformers )
3. Transformer is used for increasing or decreasing voltage. (increasing or decreasing voltage)
4. The primary winding is connected to the source of power. (primary winding )
5. Transformers are placed inside a steel tank. (steel tank)