यूजिंग ए इलेक्ट्रोमैग्नेट यू कैन मेक वर्किंग मॉडल ऑफ रेलवे सिंगल
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A magnet that consists of a piece of iron or steel surrounded by a coil is known as an electromagnet. When an electric current is passed through the coil, the metal becomes magnetic
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