Physics · Inventions and Discoveries
निम्नलिखित में से किसने 'गैल्वेनोमीटर' का आविष्कार किया था?
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- 2आंद्रे-मैरी एम्पियर✓
- 3विलियम मरडॉक
- 4लुईस वॉटरमैन
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आंद्रे-मैरी एम्पियर
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