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PHYSICS 212
PHYSICS 212

... superconducting transition temperature is analogous to that between coherent laser light and ordinary incoherent sunlight or light from a lightbulb. In both cases, a well-defined phase that is coherent over large distances allows interference effects to be seen on a macroscopic scale. Superconductiv ...
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10 Chapter-12- Electricity CBSE Study Notes

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... A wattmeter is used to measure the value of power. It is connected to the circuit directly. A wattmeter consists of coils: two fixed coils and a coil which moves in the magnetic field produced by the fixed coils. Wire used for the coils must have a high resistance; the fixed coils are in series with ...
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Chapter2 - Free-Energy-Info

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Normalized calculation of impulse current circuits for given impulse

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TAP 126- 4: Charging capacitors

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Galvanometer



A galvanometer is a type of sensitive ammeter: an instrument for detecting electric current. It is an analog electromechanical actuator that produces a rotary deflection of some type of pointer in response to electric current through its coil in a magnetic field.Galvanometers were the first instruments used to detect and measure electric currents. Sensitive galvanometers were used to detect signals from long submarine cables, and to discover the electrical activity of the heart and brain. Some galvanometers use a solid pointer on a scale to show measurements; other very sensitive types use a miniature mirror and a beam of light to provide mechanical amplification of low-level signals. Initially a laboratory instrument relying on the Earth's own magnetic field to provide restoring force for the pointer, galvanometers were developed into compact, rugged, sensitive portable instruments essential to the development of electrotechnology. A type of galvanometer that records measurements permanently is the chart recorder. The term has expanded to include use of the same mechanism in recording, positioning, and servomechanism equipment.
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