consisting of a coil of insulated wire wrapped around an iron core. The strength of magnetic field generated is proportional to the amount of current. Current (I) through a wire produces a magnetic field (B). The field is oriented according to the right-hand grip rule. An electric current flowing in a wire creates a magnetic field around the wire (see drawing below). To concentrate the magnetic field‚ in an electromagnet the wire is wound into a coil with many turns of wire lying side by side. The magnetic
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two ways. In some strings of lights‚ each light is connected to the others along a single wire (in series). In others‚ each light is attached to its own wire (in parallel). Suppose a single light bulb burns out. How do you think this will affect lights that are strung along a single wire All the lights go out How will a single burned-out bulb affect the string of lights if each light is attached to its own wire Only that single light goes out Gizmo Warm-up The Circuits Gizmo shows a circuit board
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ELECTRICITY - A Secondary Energy Source A Secondary Source The Science of Electricity How Electricity is Generated/Made The Transformer - Moving Electricity Measuring Electricity energy calculator links page recent statistics A SECONDARY SOURCE Electricity is the flow of electrical power or charge. It is a secondary energy source which means that we get it from the conversion of other sources of energy‚ like coal‚ natural gas‚ oil‚ nuclear power and other natural sources‚ which are called primary
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The History of Electricity Our knowledge of electricity has started from very humble beginnings when you look at where we are today. Electricity has been around for as long as humans have. When lightning strikes ancient people may not have understood what it was or why it happened‚ but they at the very least witnessed it happen. Nature acted as a sort of catalyst to spark the curiosity of early people. It was only until sometime between 624 BC and 546 BC where an understanding of electricity
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The attenuation constant of a zero dissipationless line is given by………………. ∝=0 ∝=1 ∝=-1 ∝≠0 The phase constant of a zero dissipationless line is given by………………. β=0 β=1 β=ω√LC β=ω√RC The velocity of propagation in zero dissipationless line is given by………………. v=1/√LC v=1/√4LC v=√(L/C) v=2√(L/C) The standing wave ratio is given by………………. SWR=1/|〖E_MAX E〗_MIN | SWR=√(|E_MAX |/|E_MIN | ) SWR=|E_MAX |/|E_MIN | SWR=4|E_MAX |/|E_MIN | The standing wave ratio is given by………………. In
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last month alone‚ depictions of Bobby Fisher (Pawn Sacrifice) and Whitey Bulger (Black Mass) are just two examples of cinematic incarnations that have served to entertain and semi-education observers. This time around‚ it’s world-renowned French high-wire walker Philippe Petit that becomes the subject of a film treatment – a man that cemented his legacy by performing depth-defying walks in and between some of the world’s most impressive structures‚ which include the Notre Dame Cathedral‚ New York’s
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Electricity Electricity: The Mysterious Force What exactly is the mysterious force we call electricity? It is simply moving electrons. And what exactly are electrons? They are tiny particles found in atoms. Everything in the universe is made of atoms—every star‚ every tree‚ every animal. The human body is made of atoms. Air and water are‚ too. Atoms are the building blocks of the universe. Atoms are so small that millions of them would fit on the head of a pin. Atoms are made of even smaller
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magnetic field in which it is located • The magnitude of the force is proportional to the magnetic field strength. Thus‚ an increase in magnetic field strength will cause an increase in the force on the wire and a decrease in magnetic field strength will cause a decrease in force on the wire. The magnitude of the current in the conductor • The magnitude of the force is also proportional to the current (I). Thus‚ an increase in current will result in an increase in force whilst a decrease
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“Landscape of the Body” displays two photographs side by side. The left depicts Frazier’s mother hospitalized. When first looking upon the piece‚ the viewer will see a woman connected to a complex piece of medical equipment by an array of wires. The many wires connecting the two seem to be placed near her neck and cranium. Further observations include Frazier’s mother is
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general uses. Electromagnetism is commonly used in microwaves‚ remote control cars‚ and it creates energy cleanly and fast. One of the most important uses for electromagnetism is in electronic motors. The main components are a core rod and many copper wires coiling around the iron rod. The coils rotate around the iron rod because of the magnetic force caused by a certain magnetic field on an electric current. While doing so‚ this turns electrical energy into mechanical energy. When this happens‚ normally
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