neutral i.e. they have the same amounts of negative and positive charge inside them. The electrons carry negative charge and the protons carry positive charge. The basic unit of charge (called the elementary charge)‚ is the amount of charge carried by one electron. The charge on a single electron is qe = 1‚ 6x10−19 C. All other charges in the universe consist of an integer multiple of this charge (i.e. Q = nqe). This is known as charge quantisation. All the matter and materials on earth are made
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Hazards of Electricity 1. Electric Shock 2. Fire / Short Circuit 3. Electric Burns Confidential Slide Electric Shock It is sudden & accidental stimulation of the body’s nervous system by electric current. It is the result of passage of electric current through the human body Confidential Slide • Most widely recognised danger of electricity. • When a person standing on the ground touches a live wire‚ or touches a live tool or machine with poor insulation or hits a live cable‚ then a person
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INVESTIGATORY PROJECT GROUP 2 Background of the Study Electricity is the physical phenomena arising from the behaviour of electrons and protons caused by the attraction of particles with opposite charges and the repulsion of particles with the same charge. Electricity from a lemon is possible to get electricity from a lemon using strips of metal. The most readily available combination is copper and zinc. The zinc piece can be taken from the casing of an old carbon "D" cell (battery);
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to detect charged bodies. Here‚ an electronic version of the scope that is more sensitive as compared to its conventional counterpart and which helps indicate the polarity of charge has been described. This circuit consumes very low quiescent power and reliably indicates charge induction and detection. The polarity of charge is indicated through LEDs (green LED indicates positive and red LED negative). In this project report‚ the detailed circuit diagram of the electronic electroscope has been given
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device‚ identical banding patterns should occur‚ leading us to interpret that the crime scene DNA and the suspect’s DNA are the same Materials: • Agorose Gel • Micropipette • 250 mL beaker • Electric box • Electric contacts + and – charges • Plastic
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compound called sodium chloride joined by ionic bonds. To understand how this process works‚ we must grasp an understanding of what an ion is and what an ionic bond is. An ion is an atom that has an electric charge and is created when an atom (or a group) gain or loses electrons. (It has an electric charge due to the imbalance and since they need to neutralise each other.) An ionic bond is a bond that transfers from one and another‚ resulting in an attraction between oppositely charged ions. Sodium
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Gel electrophoresis is a routine laboratory procedure in biochemical studies that takes advantage of a protein’s amphoteric nature to determine its molecular weight and charge by running the sample through a gel matrix under the influence of an electrically charged field. A popular example of gel electrophoresis is Sodium dodecyl sulfate-polyacrylamide electrophoresis or SDS- PAGE which has been used in this experiment to supposedly determine albumin and casein’s molecular weights respectively. The
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K.R.Mangalam World School South City-I‚ Gurgaon Class-VIII Sub.-Chemistry (Chemical Effects of Electric Current) EXTRA QUESTIONS: Q. Why the bulb glows when the electric current passes through it? Ans. Due to the heating effect of current‚ the filament of the bulb gets heated to a high temperature and it starts glowing. Q. Write a short note on: (a) LED Ans. LED- Light Emitting Diodes are used for lighting. There are two wires(called leads) attached to a LED. One lead is longer than the other
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other end would be attached to a cable. This cable would lead down to the ground where it would be buried very deep. The cable was to transmit the electric charge from the lightning on to the ground‚ thereby preventing a fire. Robert Millikan was an American experimental physicist‚ and Nobel Peace Prize winner in physics for his measurement of the charge on the electron and for his work on the photoelectric effect. He served as Chair of the Executive Council at Caltech from 1921 to 1945‚ that school
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17th century when a man by the name of William Gilbert continued Thales’s research. He studied magnetism and static electricity. Gilbert repeated the experiment by Thales with rubbing and charging objects using friction. He later invented the word “electric” to label the forces at work for whenever an object repelled or attracted the other one. He discovered that when objects rubbed‚ the act removed a fluid (humour) from one of the objects and it also left an atmosphere (effluvium) around the object
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