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MIT Physics Demo -- Pendulum and Magnet
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A solid copper pendulum is mounted between the poles of an electromagnet (solenoid). The pendulum is set into motion, and then the magnets are turned on. The magnets induce eddy currents in the copper which oppose the motion of the pendulum. The pendulum quickly slows to a stop, demonstrating an effect called eddy current braking. Eddy current brakes are widely used i
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A solid copper pendulum is mounted between the poles of an electromagnet (solenoid). The pendulum is set into motion, and then the magnets are turned on. The magnets induce eddy currents in the copper which oppose the motion of the pendulum. The pendulum quickly slows to a stop, demonst
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submitted by Suraj (549 m) on 15 Jul 2010 14:35:11 IST )
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MIT Physics Demo -- Resonant RLC Circuit
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A variable capacitor (C), large inductor or solenoid (L), and 200W light bulb (R) are connected in series to 120 VAC. The inductance of the inductor can be varied by inserting an iron core, and the capacitance can be varied by a row of switches. By varying the inductance and capacitance, we can achieve the resonance of the circuit, where maximum current flows through the resistor (light bulb).
See the original post on MIT TechTV - http://techtv.mit.edu/videos/771
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submitted by Suraj (549 m) on 15 Jul 2010 14:31:43 IST )
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