IV. Заполните пропуски глаголами: "to pass", "to prevent", "to actuate", "to separate": 1- No current... through an open circuit 2. In order to ... short circuits the armature of motor and its stator are ... by an air gap. 3. In order to ... .fluctuations, starting rheostats applied. 4. A prime mover... the armature of a d. c motor.