Physics · Electrical Engineering
निम्नलिखित में से किस सामग्री का उपयोग अर्थ इलेक्ट्रोड (earth electrode) के रूप में नहीं किया जाता है?
- 1एल्युमिनियम✓
- 2तांबा (कॉपर)
- 3कास्ट आयरन (ढलवां लोहा)
- 4गैल्वनाइज्ड स्टील
सही उत्तर देखें
एल्युमिनियम
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