The pressure that has to be applied to the ends of a steel wire of length 10 cm to keep its length constant when its temperature is raised by 100^(@)C is : (For steel Young's modulus is 2 xx 10^(11) N m^(2) and coefficient of themal expansion is 1.1 xx 10^(-5)K^(-1))

The pressure that has to be applied to the ends of a steel wire of len

1.	The pressure that has to be applied to the ends of a steel wire of length 10 cm to keep its length constant when its temperature is raised by 100^(@)C is : (For steel Young's modulus is 2 xx 10^(11) N m^(2) and coefficient of themal expansion is 1.1 xx 10^(-5)K^(-1))
Answer» `2.2XX10^(6) PA` `2.2 xx10^(8) Pa` `2.2 xx10^(9) Pa` `2.2 xx10^(7) Pa` Solution :`0.10 xx1.1xx10^(-5) xx100 =((F)/(A))/(2xx10^(11))xx0.10` `therefore (F)/(A)=" PRESSURE "=1.1xx10^(-5)xx100xx2xx10^(11)` `=2.2xx10^(8) pa` So correct CHOICE is (b).

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The pressure that has to be applied to the ends of a steel wire of length 10 cm to keep its length constant when its temperature is raised by 100^(@)C is : (For steel Young's modulus is 2 xx 10^(11) N m^(2) and coefficient of themal expansion is 1.1 xx 10^(-5)K^(-1))

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