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Experiment to Verify Ohm's law - Resistance Course Work.
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Ama Oliver 11JS Resistance Coursework Experiment to Verify Ohm's law - Resistance Course Work Introduction - Ohm's Law Ohm's Law is a mathematical formula that expresses the relationship between the electromotive force, electric current, and resistance in a circuit. The German Physicist, George Ohm discovered this relationship in 1826. When applied to a direct-current circuit, Ohm's Law states, that the electromotive force (E) measured in volts =the current (I) in amperes multiplied by the resistance (R) in ohms; therefore E = IR. When the law is used for an alternating-current circuit, resistance is replaced by impedance (Z), also in ohms. The flow of alternating current produces a counterelectromotive force, which resists the current. The strength of such resistance depends on how rapidly the current alternates. Impedance consists of resistance, called reactants combined with the circuits regular resistance to direct current. Electricians use Ohm's Law to determine the efficiency of circuits. For example, they can calculate...
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