Metal Leaf Electroscope Lab PDF

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Name:__________________ Charging Neutral Objects - Investigation Objects can be charged 3 different ways: by friction, by induction, and by contact. In this investigation, you will study two of these (charging by induction and charging by contact) first hand. Charging by Induction: Occurs when a charged object is brought close to a neutral object but doesn’t touch. Follow these steps: 1. Charge your ebonite rod (black rod) by rubbing it with fur. This causes the ebonite rod to become _______________ (positively/negatively) charged. (1)

2. Move the rod to the metal ball of the electroscope (note: the electroscope is neutral). Make sure it is close but does not touch! Question: When the charged ebonite rod is brought near the metal ball of the electroscope, what happens to the metal leaves of the electroscope? (1) ___________________________________________________________________________________________ Question: Why do you think this happens? Draw a Diagram to help explain (3)

3. Now, keeping the metal rod near the metal ball of the electroscope, touch the metal ball with your finger. Question: What effect did placing your finger on the metal ball have on the negative charges in the electroscope? (1) Draw a Diagram to help explain. (3)

Name:__________________

4. Remove your finger from the electroscope, but keep the ebonite rod near the metal ball of the electroscope. Then, slowly remove the ebonite rod from near the metal ball. Question: What happens to the metal leaves of the electroscope after you remove the ebonite rod? (1) _________________________________________________________________________________________ Question: What is the new charge of the electroscope? (positive/negative) (1)

Draw a Diagram to help explain. (3)

Charging By Conduction (Contact): 5.

Question: What happens when a negatively charged rod touches a neutral electroscope? In the diagram below, show how

the electrons would

move from

the negatively charged

ebonite rod

to the electroscope. (4)

Name:__________________

6.

Complete

the Diagram below. (4)

/22 marks Comment:

L.G: Drawing using a text and a diagram explain how to charge an...