1. Permanently Charging the Electroscope By conduction Using a Negatively Charged Rod title

2. Start with neutral electroscope Scene 1

26. Positively Charged Knob Negatively charged leaves Like charges repel Electrons from knob are repelled downward Scene 2 Click here to see last animation

27. Negatively charged leaves Like charges repel

28. Negatively charged leaves Like charges repel

29. Negatively charged leaves Like charges repel

30. Negatively charged leaves Like charges repel

31. Negatively charged leaves Like charges repel

32. Negatively charged leaves Like charges repel

33. Negatively charged leaves Like charges repel

34. Negatively charged leaves Like charges repel

35. Negatively charged leaves Like charges repel

36. Negatively charged leaves Like charges repel

37. Negatively charged leaves Like charges repel

38. Negatively charged leaves Like charges repel

39. Negatively charged leaves Like charges repel

40. Negatively charged leaves Like charges repel

41. Negatively charged leaves Like charges repel

42. Negatively charged leaves Like charges repel

43. Negatively charged leaves Like charges repel

44. Negatively charged leaves Like charges repel

45. Negatively charged leaves Like charges repel Negatively Charged knob Rod is still negative Once contact is made, electrons are transferred from the charged rod to the knob of the electro- scope. Charging by contact is called conduction. Scene 3 Click here to see last animation

62. Negatively Charged Electroscope Scene 4 Click here to see last animation Negatively charged leaves Negatively charged knob

63. Negatively Charged Electroscope Was the rod used positively charged or negatively charged? The rod used was negatively charged. What is the final charge on the electroscope when charged by conduction with a negatively charged rod? The final charge on the electroscope when charged by conduction with a negatively charged rod is negative. Make a note of this!

64. Negatively Charged Electroscope To observe electroscope being grounded, click here. To start over, click here.

65. To neutralize, connect a wire from the electroscope to the ground:

124. Extra electrons leave the electroscope and go into the ground This is called grounding. Scene 5

125. Finally remove the ground wire:

143. Neutral Electroscope Click the mouse or hit the down arrow to start over. Scene 6 Finally remove the ground wire: