Class 11 Physics NCERT Solutions Chapter 4: Motion in a Plane Question 4. 1. State, for each of the following physical quantities, if it is a scalar or a vector:Â volume, mass, speed, acceleration, density, number of moles, velocity, angular frequency, displacement, angular velocity. Answer:Â Â Scalars: Volume, mass, speed, density, number of moles, angular frequency. […]
Class 11 Physics NCERT Solutions Chapter 3: Motion in a Straight Line Question 3. 1. In which of the following examples of motion, can the body be considered approximately a point object. (a) A railway carriage moving without jerks between two stations. (b) A monkey sitting on top of a man cycling smoothly on
Class 11 Physics NCERT Solutions Chapter 13: Kinetic Theory Question 13. 1. Estimate the fraction of molecular volume to the actual volume occupied by oxygen gas at STP.’ Take the diameter of an oxygen molecule to be 3 A. Answer: Diameter of an oxygen molecule, d = 3 A = 3 x 10-10 m. Consider one
Class 11 Physics NCERT Solutions Chapter 2: Units and Measurements Question 2. 1. Fill in the blanks (a) The volume of a cube of side 1 cm is equal to…………m3. (b) The surface area of a solid cylinder of radius 2.0 cm and height 10.0 cm is equal to ……..(mm)2. (c) A vehicle moving
Class 11 Physics NCERT Solutions Chapter 1: Physical World Question 1. 1. Some of the most profound statements on the nature of science have come from Albert Einstein, one of the greatest scientists of all time. What do you think did Einstein mean when he said: “The most incomprehensible thing about the world is
A concave mirror (or converging mirror) is a spherical mirror with a reflecting surface curved inward. Unlike flat mirrors, concave mirrors focus light to a single point, making them essential in telescopes, headlights, and scientific instruments. Key Properties: Converges parallel light rays Forms real or virtual images Has a positive focal length Used for magnification and focusing Basic Terminology Term Symbol Definition Pole (P) P
