property of electric charges? (a) Total charges in an insulated system is invariable (b) A charged body is electrically unstable (c) * A charged body has equal number of positive and negative charges (d) Positively charged body is deficient of electrons x+q1+q2 = 2 q1 2.Calculate the distance x between charges q1 and q2 shown‚ given the repulsive force between them as 1.2 x 10-4 N‚ take the permittivity of vacuum where they were as 8.842x 10 -12 F/M and charge on q1= 1.6x10-19c
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Electrical Current An electric current is a flow of electrical charge. When a metal conducts electricity‚ the charge is carried by electrons moving through the metal. Electrons are subatomic particles with a negative electrical charge. When a solution conducts electricity‚ the charge is carried by ions moving through the solution. Ions are atoms or small groups of atoms that have an electrical charge. Some ions have a negative charge and some have a positive charge. Citric Acid Citric acid is
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Semiconductor The diode – A diode is an electronic component which allows electric current to glow in only one direction. Diodes are constructed from semiconductors. The anode is the positive terminal and the cathode the negative terminal. LED= light emitting diode a diode which emits light. Semiconductor materials Silicon is the most commonly used semiconductor in electronics‚ germanium is also used. These elements form a stable crystal lattice‚ with each atom sharing its four outer electrons
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PHYSICS UNIT 2 Physics P2 for GCSE Additional Science or GCSE Physics AQA GCSE Science PHYSICS 2 Unit P2.1 Forces and their effects Appreciate that forces can cause changes to the shape or motion of an object. Not only can objects can move in a straight line at a constant speed but they can also change their speed and/ or direction (accelerate or decelerate). Be able to use/produce graphs can help us to describe the movement of an object. These may be distance-time graphs or velocity-time graphs
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Chapter 26 Capacitance and Dielectrics Multiple Choice 1. Determine the equivalent capacitance of the combination shown when C = 12 pF. C C 2C C a. b. c. d. e. 2. 48 pF 12 pF 24 pF 6.0 pF 59 pF Determine the equivalent capacitance of the combination shown when C = 15 mF. C C 2C C a. b. c. d. e. 3. 20 mF 16 mF 12 mF 24 mF 75 mF Determine the equivalent capacitance of the combination shown when C = 12 nF. 2C C C 3C a. b. c. d. e. 34 nF 17 nF 51 nF 68
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‘inverse square’ law). Radiation type Made of Charge Mass Stopped by Alpha 2 protons 2 neutrons +2 Large Paper Beta Electron formed with neutron inside -1 Small Aluminum Gamma Electromagnetic wave 0 Tiny Lead 4) Open folder ‘ionisation’ and watch the video. Look closely at the particles emitted by the source at the end of the animation - what type of emission is this? Explain how these particles can cause an electric current to travel through air. An electron will be
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also hurt us badly in the long run. The Primary reason we should switch to Electric Cars is because they could save the Environment we live in. Tam Hunt writes for the Future of the Electric car on Green teen media about Electric Cars having saver batteries. “Lithium batteries will probably start showing marginal improvements around that time: (Hunt) The Eco-friendly cars have safer batteries and other equipment. Electric cars are way safer than cars on gas. For example cars that run on file have
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1.The competition to develop and market electric vehicles has increased during the last year and is expected to continue to increase. The electric bicycle industry has four major manufacturers and a large group of small companies. The major manufacturers are Honda‚ Suzuki‚ Sanyo and Yamaha. They mainly sell products to Japan and Europe. The other group of manufacturers is much smaller in size and sales volume. These manufacturers have products they sell into the U.S.‚ European and Asian markets.
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Atomic theory is the idea that matter is made up of small particles made of atoms. The atomic theory first had 5 points which were stated by John Dalton who came up with it. The first one was that all elements were made up of small units called atoms. The second one was that all atoms of a given element are identical to each other. Third‚ all the atoms were different from all the other atoms. Fourth‚ atoms of different elements combined together in equal numbers to form compounds. Fifth and final
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BATTERIES What is a battery? A battery is a container consisting of one or more cells carrying an electric charge and used as a source of power. SECONDARY BATTERIES * rechargeable * high cost (short-term) low cost (long-term) * used in objects with high energy requirements: e.g. mobile phones‚ power tools * require special handling‚ containment & disposal * limited interchangeability * long life time * produce smaller amount of waste (flat discharge curve)
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