Static Electricity: Making An Electroscope Essay

2293 words - 9 pages

TESTABLE QUESTIONS:
How can you tell if an object is charged? How can you tell if an object is positively or negatively charged? How can you tell if an electroscope is positively or negatively charged?
HYPOTHESIS:
If you bring an object close to the knob of the electroscope and the two leaves of the electroscope move apart, your object is charged. If you bring an object close to the knob of the electroscope and nothing happens to the leaves of the electroscope, your object is not charged or is currently neutral.
The electroscope itself will be neutral. When you bring a charged object close, the electrons will start to move around and change their positions. If a positively charged object is brought close to the knob of the electroscope, the electrons would want to be close to it and since positives and negatives attract each other, and will move to the top (knob) of the electroscope. This will leave a positive charge in the leaves of the electroscope. Since like charges repel, the two leaves will move apart. If the object is negatively charged, the electrons will move away from the object near the knob of the electroscope and will move to the leaves of the electroscope. The leaves are left with a negative charge, and so the leaves will repel and move apart.
You can tell if an object is positively or negatively charged by looking at a Triboelectric Series Chart. It shows that if you rub an object from the top of the chart with an object from the bottom of the chart, the object from the top will lose its electrons to the object from the bottom of the chart. The object from the bottom of the chart will become negatively charged and the object from the top of the chart will become positively charged. The objects in the bottom of the chart have a greater electron affinity or ability to hold electrons than the objects from the top of the chart.
If you bring a positive object near the knob of the electroscope, and then touch the knob of the electroscope with your finger, you have charged the electroscope by induction. When you charge by induction the neutral object gains the opposite charge as to the charge of the object that was being used to induce a charge. So in this case, the electroscope (neutral object) will gain a negative charge.
Now if we rub two objects together and use the Triboelectric Series to see which one is positively charged and bring that object close to the knob of the electroscope and charge by induction, what will happen to the electrons inside of the electroscope? The electrons will move to the top of the electroscope leaving the leaves more positive. Since there are more electrons than protons in the electroscope because of induction, the leaves will be left with more protons and will move closer together because the force of repulsion is weak but will still repel. If you move the positively charged object away, the electrons will spread out evenly in the electroscope since there would no longer be a force of...

Find Another Essay On Static Electricity: Making An Electroscope

Electricity Essay

834 words - 3 pages happens when electrons move through things. Another type of electricity is called static electricity. This happens when electrons collect together in objects. This collection of electrons gives the object a charge and then the charge acts as a force pulling objects together. The force is not very strong because the electrons start to flow back and forth between the objects. As a result the force weakens and the objects lose their charge. Dampness

The Impact of Nuclear Power Essay

1686 words - 7 pages Nuclear power, the use of exothermic nuclear processes to produce an enormous amount of electricity and heat for domestic, medical, military and industrial purposes i.e. “By the end of 2012 2346.3 kilowatt hours (KWh) of electricity was generated by nuclear reactors around the world” (International atomic energy agency Vienna, 2013, p.13). However, with that been said it is evident that the process of generating electricity from a nuclear

History of the Study of Magnetism

525 words - 2 pages , in both parallel and antiparallel directions. In each case an attractive or repulsive force is felt by each wire. The large arrows indicate direction of current, while the small arrows indicate the direction of the force felt by each wire.This experiment established that there was some sort of connection between magnetism and electricity, but a few more distinctions had to be made to generate a coherent definition. Firstly, if a metal sheet (a

Short-Term Spot Electricity Price Modeling in Competitive Electricity Markets

1650 words - 7 pages 1 Introduction Electricity when viewed from an economic perspective is probably the most important man-made commodity of human race. Ever since its invention and commercial use in 18th century to this day, its contribution to progress, growth, innovation and development to mankind has been unequivocal. Electricity markets over the decades have always been regional, oligopolistic and vertically integrated. However, in the last few decades, power

Joe Stephen

1502 words - 7 pages energy is converted to AC power, or “alternating current”, using an inverter making it suitable for use in a household. 2.2. Photovoltaic cell using the photoelectric effect Solar (or photovoltaic) cells convert the sun’s energy into electricity. The photovoltaic cell itself is made out of silicon. Silicon is a semi-conductor material, making it an electrical insulator as well as sharing some properties of metals, which is a key aspect in solar

"Warning: The Hydrogen Economy May Be More Distant Than It Appears" by Alexander Schmit

603 words - 2 pages such as water. At this point in time it takes as much energy to extract hydrogen, as the extracted energy would provide.A common concern shared among most environmentalists and other scientists is global warming. Unlike internal combustion engines, hydrogen fuel cells do not release carbon dioxide into the atmosphere. However, the procedure taken to release hydrogen from water through electrolysis, the process in which an electric current

The Physics of Sound

1459 words - 6 pages ). Relationship between sound level and ambience, pitch and frequency. Retrieved 23/02/14 from http://californiaearthquakes.weebly.com/sound-waves--earthquakes.html Static Electricity and Electromagnetism The two types of speakers explained in this article are based on two different principles in physics – static electricity and electromagnetism. While electromagnetism concerns magnetic fields produced by moving charges, static electricity

Benjamin Franklin - A man before his time!

1125 words - 5 pages "Pennsylvania Stove", the lightning rod, bifocals, and an electricity generator known as "Franklin's Electrical Machine". Franklin also had many scientific achievements such as measurement of the Gulf Stream, ship design, and tracking of a storm path. By experimenting, he proved that dark materials absorb more than light materials, proved lightning was electricity, and did many more experiments with static and regular electricity. He also introduced

my essay

2569 words - 11 pages the US scientist and investor: Mr. Thomas Edison, light/heat bulb was finally invented, lighting the world and enlightening the human life on the earth. Today Electricity has become an essential part of our lives, without Electricity there cannot be existence of the human race on the earth. Importance of Electricity We mainly need Electricity for our daily chores like microwaves which heats our delicious food, lights to shine up the dark, fans

Response and Summary to the Article “Hot, Flat, and Crowded”

929 words - 4 pages option is to move into an already overcrowded city such as Mumbai or Lagos. With the global warming it is getting hotter higher up and the people of Africa cannot turn on a fan, because of this mosquitoes can travel higher and carry disease higher. Also there is nearly no electricity other than gasoline and diesel powered generators, which are becoming more and more expensive by the day. When the generators become to expensive to buy they

Scientific Discoveries of the 19th Century

618 words - 2 pages nearly twelve percent in 1869 and by 1900 sophisticated and much safer surgical procedures were available.Ancient people knew about static electricity, rub something it gives off a spark. They also knew about lighting bold, get stuck you are a dead man. But, not until the nineteenth-century and Allessandro Volta did the know electricity as a distinct force. Today, electricity powers everything from light bulbs to computers. But the discovery of

Similar Essays

Physics Research Paper

1684 words - 7 pages influences/inspirations. Charles-Francois de Cisternay Du Fay is best known for his discovery of positive and negative electrical charges and some of their properties. He was one of the first to use an electroscope in his research, and his work inspired Benjamin Franklin's famous kite experiment. Today, we understand the importance of electricity and have found innumerable uses for it. This makes it difficult to realize that, until just a few hundred

The History Of Electricity Essay

1230 words - 5 pages The History of Electricity Luigi Galvani (1737-1798) was an Italian physician and physicist. He was one of the first to investigate the phenomenon of what came to be named as 'bioelectrogenesis'. Galvani reported a series of experiments he had been conducting since 1780 where fog's legs violently contracted if a metal scalpel accidentally touched a certain leg nerve during dissection. He showed that contractions

Electricity Essay

2787 words - 12 pages static electricity every single day. For instance, when you rub your feet on a carpet your foot begins to feel weird like some thing is attached to it, well that is static electricity being transferred into your body. Static electricity is an electrical charge that is produced by friction. Static electricity is formed when two objects are rubbed together. For instance, rubbing a balloon on your head will cause your hair to rise, which is a form

Electricity/Voltage/Ground/Resistance Essay

1072 words - 4 pages no charge. An atom has its neutrons and protons clustered together at its center, called the nucleus, while the electrons orbit around the nucleus.Electrons are negatively-charged, and protons positively-charged. In a stable substance, therefore, the charges balance out and the item comprised of that substance will have no net charge. This is why an item at rest will not spontaneously generate electricity: it is stable. Neutrons and protons