Class 11 Physics Ch 6 Notes

• Important class 11 physics ch 6 exercise solutions from Punjab Textbook.
• What is Stoke’s law? Write its formula and limitation.
• Define terminal velocity. Write its formula and unit.
• What are the conditions for ideal fluid?
• State equation of continuity. Write its equation.
• State Bernoulli’s equation. Write its equation.
• Important class 11 physics ch 6 question answer from Punjab Textbook.
• State Torricelli’s theorem. Write its equation.
• Explain how the lift is produced in an aeroplane?
• Drive Venturi relation. OR Drive the relation between speed and pressure of the fluid.
• What is difference between systolic pressure and diastolic pressure?
• Explain what do you mean by terminal velocity?
• Important class 11 physics ch 6 numerical from Punjab Textbook.
• What is meant by drag force? What are the factors upon which drag force acting upon a small sphere of radius r moving down through a liquid, depend?
• Why fog droplets appear to be suspended in air?
• Explain the difference between laminar flow and turbulent flow?: Ans: Laminar Flow Turbulent Flow • If every particle that passes a particular point moves along exactly the same path, as following by the particle which passed that point earlier, then the fluid is called laminar flow. • In this case, each particle of fluid moves along a smooth path called streamline or laminar. Examples • Flow of gentle breeze. • Flow of water around dolphins. • The irregular or unsteady flow of the fluid is called turbulent flow. • In turbulent flow, there is great disorder and a constantly changing pattern. Examples • Flow of water from the top of mountain. • Water flow at sea shores. • Flow of water in the form of water fall.
• State the Bernoulli’s relation for a liquid in motion and describe some of its application?
• A person is standing near a fast-moving train. Is there any danger that he will fall towards it?
• Two row boats moving parallel in the same direction are pulled towards each other. Explain?: Ans: When the two row boats moving parallel in the same direction then the speed of water between the boats is greater than the speed of water on the other sides of the boats. According to Bernoulli’s equation; “Where the speed of fluid is high, its pressure will be low.” Therefore, the pressure of between the boats decreases and they are pulled towards each other.
• Explain, how the swing is produced in a fast-moving cricket ball?
• Explain the working of a carburettor of a motorcar using Bernoulli’s principle: Ans: The carburettor of a car engine uses a Venturi duct to feed the correct mature of air and fuel (Petrol) to the cylinders. Air is drawn through the duct and along the pipe to the cylinders. A tiny inlet at the side of duct is fed with petrol, the air through the duct moves very fast, creating low pressure in the duct, which draws petrol vapours into the air stream.
• In an orbiting space station, would the blood pressure in major arteries in the leg ever be greater than the blood pressure in major arteries in the neck?
• For what position will be maximum blood pressure (Systolic pressure) in the body having the smallest value. (a) Standing Up (b) Sitting (c) Lying horizontal (d) Standing on one’s head? Ans: Lying horizontal. (a) Standing upright, systolic pressure has maximum value in the neck. (b) Sitting, systolic pressure has maximum value in the neck. (d) In this case, pressure has maximum value in the legs.