Решение задачи по физике раздел 73 пункт 50 электро

50. In a uniform electric field with a voltage of 20 kV / m directed horizontally, an elderberry ball weighing 0.4 g hangs on the thread. The ball was informed of the charge and the thread deviated by an angle of 15 ° from the vertical. What charge did the ball receive? Wednesday - air

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)