Class X‚ PHYSICS‚ "Electricity" Definitions 1. Insulators Those material objects that do not allow charge to pass through them are known as Insulators or non-conductors. 2. Conductors Those material objects that allow the charge to pass through them are called conductors. 3. Semi Conductors Those material objects that allow some charge to pass through them are called Semi-Conductors. 4. Free Electron Those electrons that are loosely bound by their atom and can move freely
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together by ionic bonds‚ which extend throughout the whole crystal structure. Ionic Compounds have high melting and boiling points because of the electrostatic bonds throughout their crystal lattice. Electrons are held firmly in ions so they are bad conductors of electricity when solid. When molten‚ the ion vibration and causes breaks in the electrostatic bonds‚ which make molten
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Course 4.1 Classical Electrodynamics. Unit –I Introduction to Electrostatics : Laws of electrostatics in vector notation coulomb’s law‚ Gauss’s law in integral and differential forms. Scalar potential. Surface distribution of charges and dipoles and discontinuity in the field and potential. Poisson’s and Laplace’s equations. Boundary conditions and uniquencess theorem. Potential energy and energy density of electrostatic field. Method of images‚ potential due to a point charge in presence
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gravity being the force holding things together‚ in the Bohr model‚ it is electrostatic forces. This picture on the left shows a classic case of the Bohr model. In this model‚ the electron jumps from the third orbit to the second‚ and in the process‚ it absorbs or emits an amount of electrostatic energy. This is explained by the formula ∆E=hv‚ where it shows that the change in the orbital of the electron(∆E) results in electrostatic energy (hv). The Bohr Model Bohr’s main tool in designing the Bohr
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electrical current running through it. As the drum revolves‚ the printer shines a tiny laser beam across the surface to discharge certain points. In this way‚ the laser "draws" the letters and images to be printed as a pattern of electrical charges an electrostatic image. The system
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Abstract In this experiment‚ the Ksp for calcium sulfate dihydrate‚ CaSO4·2H2O‚ by titrating 4 times a calcium sulfate dihydrate solution with diprotic EDTA‚ H2(EDTA)2-. For each trial we found the Ksp by means of molarities and activities. The results for the Ksp using only molarities was very different than the Ksp using activities. The average Ksp using molarity only was 2.26 x 10-4 and the average Ksp using activity turned out to be 2.31 x 10-5. The actual Ksp however‚ is 3.14 x 10-5. A percent
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Au/Al compound 3-35 3.2.12 Secondary breakdown 3-36 3.2.13 Thermal fatigue 3-37 3.2.14 Ion migration 3-38 3.2.15 Sn whisker 3-39 3.2.16 Problems in surface mounting (package cracking) 3.2.17 Electrostatic discharge (ESD) 3-44 3.2.18 i 3-40 Latch-up 3-53 Failure Mechanism of Semiconductor Devices 3. Failure Mechanism of Semiconductor Devices Reliability Factor and Failure Mechanism of Semiconductor Devices 3.1 The
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Chemical bond From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search A chemical bond is an attraction between atoms that allows the formation of chemical substances that contain two or more atoms. The bond is caused by the electrostatic force of attraction between opposite charges‚ either between electrons and nuclei‚ or as the result of a dipole attraction. The strength of chemical bonds varies considerably; there are "strong bonds" such as covalent or ionic bonds and "weak bonds"
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"Fission can be seen as a "tug-of-war" between the strong attractive nuclear force and the repulsive electrostatic force." When fission occurs‚ it happens because the electrostatic repulsion is stronger than the binding forces. Applications Nuclear fission is used to produce the energy provided by nuclear reactors in nuclear power stations. There are over 400 power plants in more than 30
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a few million volts. The resulting large electric fields are used to accelerate charged particles (electrons‚ protons‚ ions) to high energies needed for experiments to probe the small scale structure of matter. Principle 1. Skin effect 2. Electrostatic induction 3. Action of points Construction A hollow metallic sphere A is mounted on insulating pillars as shown‚ and a pulley B is mounted at the centre of the sphere and another pulley C is mounted near the bottom. A belt made of silk moves
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