Physics · Electrical Machines
एक डीसी (DC) मशीन में कम्यूटेटर बार या सेगमेंट निम्नलिखित में से किस सामग्री का उपयोग करके बनाए जाते हैं?
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हार्ड-ड्रॉन कॉपर (तांबा) सेगमेंट
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