Magnets. How do they work? How does the number of coils affect electromagnetism? Hypothesis: When there is a flow of moving electrons‚ a magnetic field is created. We use the equation F = NIlB (Force = Number of coils x Current x Length of Wire x Magnetic Field Strength) to work out the magnetic force produced in a wire when there is an electric current present. Using this equation we can see that increasing the length of the wire (amount of coils) gives a larger force. So increasing the amount
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Smart System or Structure What is a Smart Structure? A smart structure is a system containing multifunctional parts that can perform sensing‚ control‚ and actuation; it is a primitive analogue of a biological body. Smart materials are used to construct these smart structures which can perform both sensing and actuation functions. If truly smart‚ these intelligent systems can determine their present state‚ decide what is the optimum or more desirable state and carry out an appropriate
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vacuum along z-direction. What can you say about the direction of electric and magnetic field vectors? 1 A resistance R is connected across a cell of emf ε and internal resistance r. A potentiometer now measures the potential difference between the terminals of the cell as V. Write the expression for ’r’ in terms of ε‚ V and R. 1 The permeability of a magnetic material is 0.9983. Name the type of magnetic materials it represents. 1 Show graphically‚ the variation of the de-Broglie
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represent ways of representing subject matter. Equations are symbolic representations of subject matter which when interpreted correctly can result in conceptual understanding. For example‚ the equation φ = BA can be used to define magnetic flux as: product of magnetic field strength and the area enclosed by a conductor. This equation can also be used to identify the
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frequency. Coaxial Line was very suitable‚ since it possessed a dominant mode with zero cut-off frequency‚ providing two important characteristics: very wide bandwidth‚ and the capability of miniaturization. The lack of a longitudinal component of field‚ made it more difficult to create components using it‚ although various novel suggestions were put forth. In addition‚ those components would be expensive to fabricate. In an attempt to overcome these fabrication difficulties‚ the center conductor
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certain 0.1m3 of space‚ electric potential is found to be 5V throughout. What is the electric field in this region? 7. Two spheres of silver of same radii‚ one solid and other hollow are charged to the same potential. Which one has greater charge? 8. Where does the energy of the capacitor reside? 9. Why does the electric field inside a dielectric decrease when it is placed in an external electric field? 10. A parallel plate capacitor has a capacity of 6μF in air and 60μF when dielectric medium
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how an electrical current moving through a coil of wire can generate an electric magnetic field and power an electrical load connected to a similar coil of wire. This experiment has been performed before but the goal of this project was to increase the efficiency of the circuit. In this experiment multiple different coils were tested in order to find the most efficient way to generate a strong electromagnetic field around a coil of wire. Variables like wire gauge‚ coil density‚ and number of coils
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of the more common Brushed DC Motor which is present in many household items. The brushed DC motor consists of a rotor (the part that rotates) containing several coils of wire. This is attached to the output shaft. The rotor is surrounded by a magnetic field (this is usually a permanent magnet‚ but can be an electro magnet). Electrical connection to the rotor is accomplished via a device called a commutator. A commutator is basically a conductive ring that rotates with the rotor shaft. This ring has
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measure the linear displacement of an object in a magnetic field is presented. The application is to be safely used for demonstration purposes in the Playpen laboratory. The system uses an array of five HMC1501 Magnetoresistive (MR) sensors to sense the position of a magnet attached to the moving object. The system also has the ability to monitor the ambient operating temperature and detect if it is exposed to an external disturbing magnetic field. Several other components such as the differential
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nuclear fusion reactions. The magnetic confinement of the plasma particles in the vacuum vessel torus is obtained through the combination of toroidal and poloidal fields produced by external coils (see fig.I.1) with the additional field produced by the electrical current flowing along the plasma ring. This plasma current is generally firstly generated by induction (the plasma ring can then be considered as the secondary loop of a transformer whose primary loop is the ohmic field coil (see fig.I.1). It allows
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