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8. Which is NOT the property of temporary magnet?a) Strength can be variedc)Magnetization can be controlledb)Polarity can be changedd) N & S poles are always permanent |
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Answer» Unlike permanent magnets, temporary magnetscannot remain magnetizedon their own. They are usually made up of soft materials. They require an external force i.e. electric current to stay magnetized. As electric current is removed,they are demagnetized so far. hence, option (c) is correct. |
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