Q17Long answer
Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.
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Hint: Magnetise the needle and set it in a way that it may rotate freely suspend it. 136 E XEMPLAR PROBLEMS
Suggest an activity to prepare a magnetic compass by using an iron needle and a bar magnet.
Hint: Magnetise the needle and set it in a way that it may rotate freely suspend it. 136 E XEMPLAR PROBLEMS