Using the Gold leaf Electroscopes, how can you test a Charged Objected

-If a Negative Charged Object touches the Zinc Plate, the Electrons or Charge will be taken towards the Electroscope, into the Metal Stem and Gold leaf [Conducted into] -This makes the Stem and Gold Leaf rise, Same Charge Repels so the Gold leaf will rise -Use a Positive Charged Object, Electrons repel from the Zinc Plate, towards the Stem and Gold Leaf, Charging them with the Same Charge, the Leaf will rise