Class 11 Physics NCERT Solutions Chapter 5: Laws of Motion Question 1. Give the magnitude and direction of the net force acting on (a) a drop of rain falling down with a constant speed. (b) a cork of mass 10 g floating on water. (c) a kite skilfully held stationary in the sky. (d) […]
Class 11 Physics NCERT Solutions Chapter 6: Work, Energy and Power Question 1. The sign of work done by a force on a body is important to understand. State carefully if the following quantities are positive or negative: work done by a man in lifting a bucket out of a well by means of
Class 11 Physics NCERT Solutions Chapter 7: System of Particles and Rotational Motion Question 1. Give the location of the center of mass of a (i) sphere, (ii) cylinder, (iii) ring, and (iv) cube, each of uniform mass density. Does not the center of mass of a body necessarily lie inside the body? Answer: The
Class 11 Physics NCERT Solutions Chapter 8: Gravitation Question 1. Answer the following: (a) You can shield a charge from electrical forces by putting it inside a hollow conductor. Can you shield a body from the gravitational influence of nearby matter by putting it inside a hollow sphere or by some other means? (b)
Class 11 Physics NCERT Solutions Chapter 15 : Waves Question 15. 1. Â A string of mass 2.50 kg is under a tension of 200 N. The length of the stretched string is 20.0 m. If the transverse jerk is struck at one end of the string, how long does the disturbance take to reach
Class 11 Physics NCERT Solutions Chapter 10: Mechanical Properties of Fluids Question 10. 1. Explain why (a) The blood pressure in humans is greater at the feet than at the brain. (b) Atmospheric pressure at a height of about 6 km decreases to nearly half of its value at the sea level, though
Class 11 Physics NCERT Solutions Chapter 14: Oscillations Question 14. 1. Which of the following examples represent periodic motion? (a) A swimmer completing one (return) trip from one bank of a river to the other and back. (b) A freely suspended bar magnet displaced from its N-S direction and released. (c) A hydrogen molecule
Class 11 Physics NCERT Solutions Chapter 12: Thermodynamics Question 12. 1 A geyser heats water flowing at the rate of 3.0 litres per minute from 2 7°C to 77°C. If the geyser operates on a gas burner, what is the rate of consumption of the fuel if its heat of combustion is 4.0
Class 11 Physics NCERT Solutions Chapter 11: Thermal Properties of matter Question 11. 1. The triple points of neon and carbon dioxide are 24.57 K and 216.55 K respectively. Express these temperatures on the Celsius and Fahrenheit scales. Answer: The relation between kelvin scale and Celsius scale is TK – 273.15 =TC => TC=TK– 273.15 Question
Class 11 Physics NCERT Solutions Chapter 9: Mechanical Properties of Solids Question 9. 1. A steel wire of length 4.7 m and cross-sectional area 3.0 x 10-5Â m2Â stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0 x 10-5Â m2Â under a given load. What is the ratio of
