A drag cup rotor has low inertia. Therefore it requires little amount of energy.
The speed transducer using a drag cup rotor has the main advantage of
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Question context
This question is part of 📡 Electronics and Communication Engineering (ECE) within the broader 🛠️ Engineering Essentials subject and appears in the DemoPaper-Pakistan preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.