A thin `1m` long rod has a radius of `5mm`. A force of `50pi KN` is applied at one end to determine its Young's modulus Assume that the force is exactly known. If the least count in the measurement of all lengths is `0.01mm` which of the following statements is false ?

The least count of three instruments are 1 mm, 0.1 mm and 0.01 mm. Which one has the greatest precision?

The least count of three instruments are 1 mm, 0.1 mm and 0.01 mm. Which one has the greatest precision?

A telephone wire 125m long and 1mm in radius is stretched to a length 125.25m when a force of 800N is applied. What is the value of Young’s modulus for material of wire?

A telephone wire 125 m long and 1 mm in radius is stretched to a length of 125.25m when a force of 800N is applied. What is the value of young's Modulus for the material of the wire ?

A structural steel rod has a radius r(=10 mm) and a length l(=1 m). When a force F(= 100 kN) is applied, it stretches it along its length. Young's modulus of elasticity of the structural steel is 2.0xx10^(4) Nm^(-2) . What is the elastic energy density of the steel rod ?

A structural steel rod has a radius r(=10 mm) and a length l(=1 m). When a force F(= 100 kN) is applied, it stretches it along its length. Young's modulus of elasticity of the structural steel is 2.0xx10^(11) Nm^(-2) . What is the elastic energy density of the steel rod ?

A force of 20 N applied to the ends of a wire 4-m long produces an extension of 0.24 mm. If the diameter of the wire is 2 mm, find the Young's modulus of its material.