Author: Prashant

CLASS 11 PHYSICS NCERT & CLASS 12 PHYSICS NCERT NEW TEXTBOOK SYLLABUS

CLASS 11 PHYSICS NCERT & CLASS 12 PHYSICS NCERT NEW TEXTBOOK SYLLABUS

Chapter 1: Units and measurements 1.1 Introduction 1.2 The international System of units 1.3 Significant figures 1.4 Dimensions of physical quantities 1.5 Dimensional formula and dimensional equations 1.6 Dimensional analysis and its applications   Chapter 2: Motion in a straight line 2.1 Introduction 2.2 Instantaneous velocity and speed 2.3 Acceleration 2.4 Kinematics equations for uniformly accelerated motion   Chapter 3: Motion in a plane 3.1 Introduction 3.2 Scalars and vectors 3.3 Multiplication of vectors by real numbers 3.4 Addition and subtraction of vectors- graphical method 3.5 Resolution of vectors 3.6 Vector addition analytical method 3.7 Motion in a plane 3.8...

NEET questions on the topic of mechanical properties of solids

NEET questions on the topic of mechanical properties of solids

NEET questions on the topic of mechanical properties of solids: The property of a material to resist deformation under stress is called: a) Hardness b) Elasticity c) Toughness d) Ductility Answer: b) Elasticity Which of the following materials has the highest Young’s modulus? a) Steel b) Rubber c) Glass d) Aluminium Answer: a) Steel A metal rod of length 1 m and cross-sectional area 1 cm² is stretched by a force of 100 N. If the Young’s modulus of the metal is 2 x 10^11 N/m², what is the increase in length of the rod? a) 5 x 10^-4 m...

Mechanical properties of solids

Mechanical properties of solids

Mechanical properties of solids refer to the response of materials to external forces or loads. Some of the important mechanical properties of solids include:

Elasticity: It is the ability of a material to deform when subjected to an external force and then return to its original shape and size when the force is removed. The measure of elasticity is called Young’s modulus or elastic modulus.

Plasticity: It is the ability of a material to deform permanently without breaking or cracking when subjected to an external force beyond its elastic limit.

Hardness: It is the resistance of a material to indentation or scratching. It is measured using various techniques such as the Vickers hardness test, the Rockwell hardness test, and the Brinell hardness test.

Toughness: It is the ability of a material to absorb energy without fracturing. It is measured by the amount of energy absorbed per unit volume of the material.

Ductility: It is the ability of a material to deform under tensile stress and sustain plastic deformation without breaking. It is measured by the percentage of elongation or reduction in the cross-sectional area of the material.

Brittleness: It is the tendency of a material to break or fracture when subjected to stress. Brittle materials exhibit little or no plastic deformation before fracture.

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