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  4. Platinum and silicon are heated up to 250° C and after that cooled. In this process of cooling

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Q. Platinum and silicon are heated up to $ 250^{\circ} C $ and after that cooled. In this process of cooling

Uttarkhand PMTUttarkhand PMT 2011

Solution:

On cooling the resistance of platinum (metal) will decrease and that of silicon (semiconductor) will increase.