NitSab

Chapter 1: units and measurements class 11 questions answers Chapter 1: units and measurements class 11 questions answers 1. Multiple Choice Questions i) [L 1 M 1 T -2 ] is the dimensional formula for: (A) Velocity (B) Acceleration (C) Force (D) Work ii) The error in the measurement of the sides of a rectangle is 1%. The error in the measurement of its area is: (A) 1% (B) ( )% (C) 2% (D) None of the above iii) Light year is a unit of: (A) Time (B) Mass (C) Distance (D) Luminosity iv) Dimensions of kinetic energy are the same as that of: (A) Force (B) Acceleration (C) Work (D) Pressure v) Which of the following is not a fundamental unit? (A) cm

Chapter 5: Gravitation Chapter 5: Gravitation Formulas: Gravitational force, Universal law of gravitation, Gravitational constant, Free fall, Gravitational potential energy, Escape velocity Introduction Gravitation is the force of attraction between two objects with mass. This chapter discusses the fundamental principles of gravitation, including Newton's universal law of gravitation, gravitational potential energy, and concepts related to free fall, escape velocity, and orbits. 1. Universal Law of Gravitation Definition: According to Newton’s law of universal gravitation, every particle of matter in the universe attracts every other particle with a force directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. Key Concepts: Formula: F = G (m₁ × m₂) / r² where F is the gravitational force, G is the gravitational constant, m₁ a

Chapter 4: Laws of Motion Chapter 4: Laws of Motion Formulas: Newton's Laws, Force, Inertia, Momentum, Acceleration, Action and Reaction, Definitions, Mass, Velocity, Gravity Introduction The laws of motion are the foundation of classical mechanics. In this chapter, we explore Newton's three laws of motion, which describe how objects behave when forces act upon them. We will also understand the concepts of force, inertia, momentum, and friction, and how they contribute to motion in various scenarios. 1. Newton's First Law of Motion (Law of Inertia) Definition: An object at rest will remain at rest, and an object in motion will continue moving in a straight line with constant speed unless acted upon by an external force. Key Concepts: Inertia: The property of an object to resist changes in its state of motion. Force: A push or pull that can cause an object to move, stop, or change direct

Chapter 3: Motion in a Plane Chapter 4: Motion in a Plane formulas Physics, Formulas, Kinematics, Vectors, Scalars, Motion in Two Dimensions, Definitions Introduction Motion in a plane involves the study of objects that move in two dimensions, such as projectile motion and circular motion. This chapter explores vector quantities, their components, and their application in understanding motion in a plane. 1. Scalars and Vectors Definition: Scalars are quantities that have magnitude only, while vectors have both magnitude and direction. Examples of Scalars: mass, time, speed, distance Examples of Vectors: velocity, displacement, acceleration, force 2. Vector Addition Definition: Vector addition is the process of combining vectors using methods such as the triangle law or the parallelogram law. Triangle Law of Vector Addition: If two vectors are represented by the two sides of

Chapter 2: Mathematical Methods Mathematical Methods Physics, Formulas, Calculus, Vectors, Mathematical Methods, 11th physics Introduction This chapter discusses essential mathematical tools that are widely used in physics, including differentiation, integration, vectors, and vector algebra. These methods form the basis for solving many physical problems. 1. Differentiation Definition: Differentiation is the mathematical process of finding the rate at which a quantity changes. It is used to find velocity, acceleration, and other rates of change in physics. Formula: The derivative of a function y = f(x) with respect to x is: dy/dx = f'(x) Example: If y = x^2 , then dy/dx = 2x . 2. Integration Definition: Integration is the inverse process of differentiation. It is used to find quantities like area, volume, and the total value of a varying quantity. Formula: The integral

Chapter 1 Units and Measurements Chapter 1 : Units and Measurements formulas Physics, Formulas, Kinematics, Measurements, Units, Definitions Introduction Physics serves as the backbone of understanding the natural world. It explains the fundamental principles governing matter, energy, and their interactions. This article presents a complete overview of the essential formulas and definitions from Chapter 1 of physics, covering key concepts such as dimensional analysis, units of measurement, significant figures, and basic kinematic equations. 1. Dimensional Analysis Definition: Dimensional analysis is a method used to convert one set of units to another and to verify the consistency of equations by analyzing their dimensions. Key Dimensions: Length (L): Measure of distance. Mass (M): Measure of the amount of matter. Time (T): Measure of duration. Formula: The dimensions

  How to Do Tadasana and Its Benefits Tadasana, also known as Mountain Pose, is a foundational yoga pose that offers numerous benefits for both the body and mind. In this article, we will explore how to properly perform Tadasana and delve into the advantages it provides. Benefits of Tadasana Improves Posture: Regular practice of Tadasana helps in aligning the spine, reducing slouching, and improving overall posture. Strengthens Legs: By engaging the thighs, calves, and ankles, Tadasana enhances leg strength and stability. Increases Stability: This pose helps in developing a sense of balance and stability by strengthening the core and lower body. Enhances Body Awareness: Standing still and concentrating on your alignment increases awareness of body positioning and alignment. Promotes Calmness: Deep, steady breathing during Tadasana helps to calm the mind and reduce stress. How to Do Tadasana Starting Position: Stand with your feet together, toes pointing forward. Your