Physics · Electrical Measurements
किस प्रकार का विद्युत मापन यंत्र आवृत्ति के परिवर्तनों (frequency variations) से पूरी तरह अप्रभावित रहता है?
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स्थायी चुंबकीय गतिशील कुंडली (PMMC) यंत्र
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