ELECTRICITY & MAGNETISM • Electric Charges‚ Forces & Fields • Electric Potential & Electric Potential Energy • Electric Current & Direct Current Circuits • Magnetism • Magnetism Flux & Faraday’s Law of Induction • Electromagnetic Waves Electric Charges‚ Forces‚ and Fields • Electric Charge • Insulators and Conductors 19-1 Electric Charge The effects of electric charge were first observed as static electricity: • Coulomb’s Law • The Electric Field • Electric Field Lines • Shielding and
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Physical Science Review Waves‚ Sound and Light Waves- What are Waves? 1. 1 .The substance that a move through is called a medium. 2. True or False: Particles are squeezed together during rarefactions. 3. True or False: Waves that require a medium through which to travel are called electromagnetic waves. 4. True or False: The matter in the medium moves perpendicular to a transverse wave. 5. What medium is often used to transfer computer information? Optic Fibers 6. 6 .A
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lightning rod is a metal pole with a wire attached to it that runs from a high point in the building and down to the ground. They are used to prevent damage to buildings. Grounding static charges can help prevent sparks near flammable fuels. Paint sprayers work better if the object and the paint have different charges. Photocopiers use electrostatic principles in their operation. Grounding wires prevent damage to electrical equipment. Electrostatic precipitators work by creating charged waste
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VAN DE GRAAFF GENERATOR This is a machine that can build up high voltages of the order of 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
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Worksheet Electric charges and field 1. 1. An oil drop of 12 excess electrons is held stationary under a constant electric field of 2.55x104 v/m. The density of oil is 1.26 gm/cc. Estimate the radius of the drop.[Ans:1.428x10-6m] 2. Two small spheres each of mass 10-6kg are suspended from a point by silk threads 50 cm long. They are equally charged and repel to a distance of 20cm.Calculate the charge on each.[Ans:3.012x10-9C] 3. Two charges +20µC and -20µC are placed 20cm
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or push it away? The best explanation to this question involves the introduction of the concept of electric field. Action-at-a-distance forces are sometimes referred to as field forces. The concept of a field force is utilized by scientists to explain this rather unusual force phenomenon that occurs in the absence of physical contact. While all masses attract when held some distance apart‚ charges can either repel or attract when held some distance apart. An alternative to describing this action-at-a-distance
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NANO ELECTRIC GENERATOR PAPER PRESENTATION SUBMITTED BY‚ M.ANANTHA GANESH M.KARTHIKEYAN 3rd YEAR EEE 3rd YEAR EEE (ananthganesh0@gmail.com) (karthikpandiyan13@gmail.com) (Contact No-8870804996) Department of Electrical and Electronics Engineering FRANCIS XAVIER ENGINEERING COLLEGE TIRUNELVELI-627001 ABSTRACT: Power‚ more specifically electric power is very
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physics notebook as practice assignment. B: Do all questions in sequence. UNIT –I: ELECTROSTATICS 1. Three identical charges each +q are placed at the corners of an equilateral triangle of side d cm. Calculate the force on a +ve charge +2q at the centroid of the triangle. 2. Force acting on a charged particle kept between the pair of plates‚ having equal and opposite charge‚ is F. If one of the plates is removed‚ find the force acting on the same particle. 3. The plates of a parallel plate
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Compare how poets portray war in The Charge Of The Light Brigade and one other poem In The Charge of The Light Brigade and Mametz Wood‚ both Sheers and Tennyson present similar ideas about war. The reader is given the distinct impression from both poems that the authors think that war is a waste of time‚ unnecessary and pointless. In Mametz Wood Sheers talks about "the wasted young" suggesting that these soldiers that have been found in the farmers field died before their time because of war
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CHAPTER – 29 ELECTRIC FIELD AND POTENTIAL EXERCISES 1. 0 = Coulomb 2 Newton m kq1q2 2 =l M L T 1 –1 –3 4 F= 2. r2 3 q1 = q2 = q = 1.0 C distance between = 2 km = 1 × 10 m kq1q2 r 2 so‚ force = F= (9 10 9 ) 1 1 (2 10 ) 3 2 = 9 10 9 2 2 10 6 = 2‚25 × 10 N 3 The weight of body = mg = 40 × 10 N = 400 N So‚ 2.25 10 3 wt of body = 4 10 2 force between ch arg es 1 = (5.6) –1 = 1 5 .6 3. So‚ force
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