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A piece of aluminium and germanium each are cooled from $T_1\;K $ to $T_2\;K$. The resistance of:

(a) each of them decreases (b) each of them increases (c) aluminium increases and that of germanium decreases (d) aluminium decreases and that of germanium increases

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(d) aluminimum decreases and that of germanium increases
answered Nov 7, 2013 by pady_1

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