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 ...
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... separate them from the gas, purifying the air. These plates are carefully cleaned so that they can be used again properly.
Electrostatics also provides certain jobs. There is a need for workers to work electrostatic precipitators. Also electrostatic painters provide jobs for many people. There are many associations that focus on electrostatics and technology.
Static Electricity can be extremely dangerous, but extremely helpful at the same time.
Works Cited
.www.ducksters.com/science/static_electricity.php
(www.ducksters.com)
.www.sciencemadesimple.com/static.html
(www.sciencemadesimple.com)
.www.enchantedlearning.com/physics/staticelectricity.shtml
(www.enchantedlearning.com)
.www.chem4kids.com/files/atom_structure.html
(www.chem4kids.com)
.www.education.jlab.org/atomtour/listofparticles.html
(www.education.jlab.org)
(Jefferson Lab)
Nagaoka rejected Thomson's model on the ground that opposite charges are impenetrable. He proposed an alternative model in which a positively charged center...
Michael Faraday was the man behind the discovery of electromagnetic induction. Electromagnetic induction is the creation of an electric current by using a magnetic field. Faraday’s first experiment was set up by coiling to separate lengths of copper wire around a wooden block. The two coils had to be separated he did this with thread. One of the coils was connected to a galvanometer (an instrument used to detect small electrical currents), while the second coil was connected to a battery and switch. As Faraday closed the switch there was a small and brief change in the reading on the galvanometer. What this meant was that Faraday had seen a little and concise current that passed through the galvanometer circuit. Faraday observed the same affect in the galvanometer circuit when the battery circuit was turned off, except the change was in the opposite direction or negative of the first reading of the galvanometer.
If you're reading this article, you've decided you want a guide to find out how to get on your way to becoming an electrician, of course, the first step is to actually become an electrician apprentice. This is a very promising field to go into, as a survey done by the government has said that there will be a viable need for electricians in a large amount for at least the next ten years. We have to remember that everything in our world has become electronic. Robots are making cars, everything is focused around electricity. The demand for electricians will only become greater as time goes on.
When I am not using them I will place them away from my experiment and
Metals contain a sea of electrons (which are negatively charged) and which flow throughout the metal. This is what allows electric current to flow so well in all metals. An electrode is a component of an electric circuit that connects the wiring of the circuit to a gas or electrolyte. A compound that conducts in a solution is called an electrolyte. The electrically positive electrode is called the anode and the negative electrode the cathode.
Electrolyte can be defined as the aqueous or molten substances which when dissolved in a solvent dissociates into ions and can transmit negatively charged ions.
In a laboratory scientist will use a process called gel electrophoresis to separate DNA fragments. The DNA is cut into different sized fragments as a result from using restriction enzymes. The different sized DNA fragments are organized injected on agarose gel with an added substance that helps it glow after the test. DNA is negatively charged. Electricity is producing a positively charged are and a negatively charged area. Opposites attract and as a result the negatively charged DNA will move quickly to the positively charged area. Smaller DNA fragments will run faster the larger DNA fragments. After the electricity is turned off smaller DNA fragments will be closer to the positively charged area and the larger DNA fragments will be farther from the positively charged area. While it is glowing scientist can take a picture of the data and record the results and compare DNA samples to look for any abnormalities.
This experiment demonstrated the ability of agarose gel electrophoresis to separate the mixture of dyes into their individual components by the application of a combination of dyes to the same sample well. The experiment effectively demonstrated that the dyes where different in structure, energy, and composition. Most of the dyes where negatively charged at neutral pHs and only one with positive charge. The positive charge one moved an opposite direction compared to the other dyes.
There are many kinds of batteries which consist of different materials in order to produce an electric charge. Here are some of the most common batteries, what they consist of and how they work.
Electroplating Experiment Aim To find the amount copper gains or loses on the electrodes using different amounts of current each time during electrolysis. How the changing of current affects the electroplating of copper. Introduction Electroplating is generally carried out in order to improve the appearance or corrosion resistance of the surface of a metal by electrodepositing a thin layer of metal ion on it. The metal substrate to be coated is made by the cathode in an electrolytic cell. The cell used in electroplating contains an electrolyte which is usually an aqueous solution containing a reasonably high concentration of an ion of the metal which is to be electroplated on the surface.
An electrode is a component of an electric circuit that connects the conventional wiring of the circuit to a conducting medium such as an electrolyte or a gas. The electrically positive electrode is called the anode and the negative electrode the cathode. If an anode and a cathode are placed in a solution of an electrolyte and a source of direct current is connected between them, the positive ions in the
You take voltage measurements by counting the number of divisions a waveform spans on the oscilloscope's vertical scale. Adjusting the signal to cover most of the screen vertically, then taking the measurement along the centre vertical graticule line having the smaller divisions makes for the best voltage measurements. The more screen area you use, the more accurately you can read from the screen.
Electrical Engineers research, develop, design, and test electronic components, products, and systems for commercial, industrial, medical, military, and scientific applications (Cosgrove 749). They are concerned with devices that use small amounts of electricity that make up electronic components such as integrated circuits and microprocessors. By applying principles and techniques of electronic engineering they design, develop, and manufacture products such as computers, telephones, radios, and stereo systems (EGOE, 121). Electrical engineers touch everyone lives through the things they have designed or created. Electrical engineers have invented the lights in your house, the television, the stereo, the telephone, computers, and even your doctor’s blood pressure gauge (Stine 300).
Electrolysis Investigation Planning In this investigation, I will assess how changing the electric current in the electrolysis of acidified water affects the rate at which hydrogen gas is produced. The solution to be electrolysed is made up using acid and water. It is of little consequence what acid is used however in this case I will use Sulphuric acid (H2SO4). When H2SO4 is put in water it is dissociated and forms ions: H2SO4 → 2H (2+) + SO4 (2-) Ions are also present from the water in the solution: H2O → H (+) + OH (-) During the electrolysis process, the positive hydrogen ions move towards the cathode and the negative hydroxide and sulphate ions move towards the anode.
Upon opening the switch the power is cut to the coil, given that the earth magnetic field generates a torque on the aligned, spinning hydrogen nuclei, they begin to precess around the direction of the earth total field.As the protons precess,the precession produces a time varying magnetic field which induces a small alternating current in the coil such that the frequency of precession of the nuclei is equal to the frequency of the AC current.The proton precession measures the frequency of the oscillatin field and since its equal to the precession frequency of the protons it can be used to determine the strength of the external field.