On mixing impurities, the elasticity of a materialA. decreasesB. increasesC. sometimes increases and sometimes decreasesD. remains same

On mixing impurities, the elasticity of a materialA. decreasesB. incre

1.	On mixing impurities, the elasticity of a materialA. decreasesB. increasesC. sometimes increases and sometimes decreasesD. remains same
Answer» Correct Answer - B `y=("stress")/("strain") therefore "strain"=(10^(9))/(2xx10^(11)) =0.5 xx10^(-2)` `therefore (Delta r)/(r ) = 0.5 xx10^(-2)` `therefore Delta r = 2.8 xx 0.5 xx 10^(-2) = 14 xx 10^(-3) A^(@)`.

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On mixing impurities, the elasticity of a materialA. decreasesB. increasesC. sometimes increases and sometimes decreasesD. remains same

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