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the sensitivity of a moving coil galvanometre can be increased by? if germaniuum is to be doped eith donor impurity, then the donor atom should be? 1 tetravalent 2 pentavalent 3 trivalent 4 none of above. and why?
HiiIt depend upon the impurity that you want to make .the answer can be either tetravalent or pentavent giving rise to either p type or n type semiconductor
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