Q1: When switch closes, the current initially register a large amount of current, then the current decay to a much lesser value over time as the motor speeds up. Why?
Motor current is inversely proportional to speed, due to the counter-EMF by the armature as it rotates.
Q2:
- Field: the portion of the motor creating the stationary magnetic field
- Armature: the rotating portion of the motor
- Commutator: copper strips where the armature coil leads terminate, usually located at one end of the shaft
- Brush: a stationary carbon block designed to electrically contact the moving commutator bars
Q3:
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