4. What is an electromagnet and how is it made? Name the factors which help in
changing the strength of an electromagnet.
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17
Explanation:
when an electric current flows in a wire it creates a magnetic field around the wire this effect can be used to make an electromagnet a simple electromagnet comprise a length of wire turning into a coil and connected to A battery or power supply
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2
Explanation:
व्हाय ए एंड इलेक्ट्रो मैग्नेट एंड हाउ इज इट मेड नेम फैक्टर्स विच हेल्प इन चेंजिंग डिस्टेंस ऑफ द इलेक्ट्रो मैगनेट
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