In electromegnet induction type energy meter why the rotating alluminium disk is perforated? Its surface is dotted and rough, why?
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In electromegnet induction type energy meter why the rotating alluminium disk is perforated? Its surface is dotted and rough, why?
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1.aluminium disc is prefer compare to copper disc because of light weigh and low cost.
2.braking torgue depends on resisrance of disc(eddy current path).resistance of aluminium this is low.
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