A precision instrument that measures electrical power or the force created by electromagnetic interactions, using electromagnetic deflection principles.
From electro- + dynamometer (from Greek dynamis 'power' + metron 'measure'). Developed in the 19th century as physicists needed precise ways to measure electrical effects and compare them scientifically.
An electrodynamometer works by measuring how much a coil carrying one current is pushed by a magnetic field from another coil—it's basically a very precise scale for electrical forces.
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