The Transformer

Тест состоит из 10 вопросов к тексту. Он проверяет знание базовой терминологии и основных функций трансформатора, принцип работы, названия компонентов. Подходит для тех, кто уже знаком с основами темы. Тhe Heart of Power: The Transformer A transformer is a very important device in the electric power system. It is not moving – it is a static device. Transformers are usually in substations and at power plants. What does it do? The main job of a transformer is to change the voltage level of electricity. It can increase voltage for long-distance transmission. This is a step-up transformer. It can also decrease voltage for safe use in our homes, schools, and factories. This is a step-down transformer. Transformers work using the principle of electromagnetic induction. They have two coils: a primary coil and a secondary coil. When alternating current goes through the primary coil, it creates a magnetic field. This field then creates a current in the secondary coil, but with a different voltage. Without transformers, we cannot transmit electricity efficiently over long distances.