Question

What is defined as the ratio of tensile stress to the longitudinal strain?
A. Bulk modulus
B. Young’s modulus
C. Shear modulus
D. Compressibility

Answer 1

Hint: Young’s Modulus can be otherwise called as elastic modulus or the tensile modulus. This is defined as the measurement of mechanical characteristics of linear elastic solids such as rods, wires and so on. There will be some other numbers existing which is giving us a measure of elastic characteristics of a material. They include the Bulk modulus and the Shear modulus. This will help you in answering this question.

Complete answer:
The young’s modulus is defined as the measure of the ability of a material to overcome variations in length when the body is undergoing lengthwise tension or compression. There will be some other numbers existing which is giving us a measure of elastic characteristics of a material. They include the Bulk modulus and the Shear modulus. But usually the value of Young’s Modulus is most common. This is because of the reason that it provides details about the tensile elasticity of a material. Sometimes it is called the modulus of elasticity. This can be found by taking the ratio of the longitudinal stress to the strain. The stress as well as strain both can be defined in the case of a metal bar under tension.

Therefore the correct answer for the question is option B.

Note:
Young’s modulus is found to be a numerical constant. It has been given the name of an English physician and physicist Thomas Young. Young’s modulus can be used to define the elastic characteristics of a solid undergoing tension or compression in only one direction. The case of a metal rod that after being stretched or compressed lengthwise returns to its original length can be considered as an example for this.