ï»¿ The figure shows the load extension graph of two wires of material A and B having same dimensions. Which of the two materials has greater value of Young’s modulus? from Physics Mechanical Properties of Solids Class 11 Manipur Board

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The figure shows the load extension graph of two wires of material A and B having same dimensions. Which of the two materials has greater value of Young’s modulus?

Young's modulus is given by,

Therefore,

Thus the slope of load v/s extension graph is

For wires of same dimensions, the slope of graph is directly proportional to Young's modulus. Since slope of graph for A is greater than that of B, therefore the value of Young's modulus of material of A is greater than B.
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Define interatomic forces and give an example?

The force between atoms of the molecule is called interatomic force.

E.g.The nucleus and electron cloud of a molecule is binded by electrostatic force.
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What is the force of cohesion?

Cohesive attraction or cohesive force is the force of attraction between same types of molecules sticking together.
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What is the nature of inter-atomic or inter-molecular forces?

Inter-atomic or inter-molecular forces are electrostatic in nature.

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What do you understand by intermolecular forces?

Intermolecular force is the force between the molecules of the substance is called intermolecular force.

There is a dipole-dipole interaction between the molecules.
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What is the force of adhesion?

Adhesive force is the attractive force between two unlike molecules. They are caused by forces acting between two substances like electrostatic force (attraction due to opposing charges), mechanical force etc.

E.g., Force of attraction between gum and paper.

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