1. They referred to this experiment's results in the article. - притяжательный падеж имени существительного
2. A charged capacitor becomes a power source. - показатель 3-го лица единственного числа
3. The plates of a capacitor are charged both positively and negatively. - множественное число
1. Newton thought to make an astronomical telescope. - to make (infinitive); thought - to think
2. Everybody knows that every battery has two terminals. - knows - to know
З. Не shall take an active part in the discussion of this report. - shall