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← ScienceWhich mechanism minimizes energy consumption when transitioning an electric motor powered elevator at constant speed?
A)Regenerative braking capturing potential energy✓
B)Friction braking dissipating kinetic energy
C)Eddy current braking induced magnetic drag
D)Dynamic braking modulating motor torque
💡 Explanation
When a motor transitions at constant speed, regenerative braking uses the motor as a generator to convert kinetic and potential energy into electrical energy, storing it for later use and minimizing wasted energy. Therefore regenerative braking minimizes energy consumption rather than friction braking, eddy current braking, or dynamic braking which dissipate energy as heat or modulate output only.
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