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There is some change in length when a 33...

There is some change in length when a `33000 N` tensile force is applied on a steel rod of area of cross-section `10^(-3)m^(2)`. The change in temperature of the steel rod when heated is
`(Y = 3 xx 10^(11)N // m^(2) , alpha = 1.1 xx 10^(-5 //@)C)`

A

`20^@C`

B

`15^@C`

C

`10^@C`

D

`0^@C`

Text Solution

Verified by Experts

The correct Answer is:
C
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There is some change in length when a 33000 N tensile force is applied on a steel rod of area of cross-section 10^(-3)m^(2) . The change of elongation of the steel rod when heated is (Y = 3 xx 10^(11)N // m^(2) , alpha = 1.1 xx 10^(-5 //@)C)

There is same change in length when a 33000 N tensile force is applied on a steel rod of area of cross-section 10^(-3)m^(2) . The change of temperature required to produce the same elongation, if the steel rod is heated , if (The modulus of elasticity is 3xx10^(11) N//m^(2) and the coefficient of linear expansion of steel is 11 xx 10^(-5) //^(@)C ).

When a force is applied on a wire of uniform cross-sectional area 3xx10^-6m^2 and length 4 m, the increase in length is 1mm. Energy stored in it will be (Y=2xx10^(11)(N)/(m^2) )

The force in newton required to increase by 1% length of a rod of area of cross section 10^(-3) m squre is …….., Modulus of elaticity of rod is 1.2 xx 10^(12) N m^(-2)

A steel rod of cross-sectional area 1m^(2) is acted upon by forces as shown in the Fig. Determine the total elongation of the bar. Take Y = 2.0xx10^(11) N//m^(2)

What force should be applied to the ends of steel rod of cross sectional area 10 cm^(2) to prevent it form elongation when heated form 273 K to 303 k ? (alpha " of steel" 10^(-5).^(@)C ^(-1),Y=2xx 10^(11) NH^(-2))

On increasing the length by 0.5 mm in a steel wire of length 2 m and area of cross section 2 mm^2 , the force required is [Y for steel =2.2xx10^11(N)/(m^2) ]

NCERT FINGERTIPS-PRACTICE PAPERS-Practice Paper 3
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