Charge of electron quotes2/17/2024 When a positively charged object is brought near the electroscope (Fig. 5), the negative charges in the metal of the scope travel to the leaves, which both become negatively charged and repel each other. When a negatively charged object is brought near the metal end of the scope (Fig. Īnother useful tool for detecting static charge is an electroscope (Fig. This phenomenon is called charging by induction. In this case the electrons are attracted to the glass and move to the top surface of the paper. 3, a piece of glass with a positive charge is brought near a piece of paper. The attractive force between the negative charges on the balloon and the positive charges on the upper surface of the paper causes the paper to move toward and stick to the balloon. However, when the negatively charged balloon is brought near the paper, the balloon repels the electrons in the paper to the far side of the paper, leaving the side near the balloon slightly positive. The paper is normally neutral, with the positive and negative charges evenly distributed. 2, a negatively charged balloon is brought near a piece of paper. Testing to see if an object is charged is fairly straightforward. An atom is made up of protons and neutrons (which make up the nucleus) and electrons (which orbit the nucleus). Charge is a result of subatomic particles in an atom.Several factors affect the amount of force between 2 charged objects, such as the amount of charge on each object and the distance between the objects. 1).Ĭharge is detected when 1 charged object exerts a force on another object. Like charges repel and unlike charges attract (Fig.There are 2 types of charge, positive and negative.Charged objects experience a force when placed in an electric field. Charge is a physical property of matter, just like mass or volume. Electricity (static or current) is a result of the quantity charge.Students already should be familiar with the following basic information about static electricity. The following sections provide a little more information on how to test for static electricity and how to determine which objects have positive or negative charges. The triboelectric series will give you a starting point for finding out what combination of materials provides a good result when trying to produce a static charge. Product Management Coordinator for Physical Science
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