Buy Educational software online
Download and practice the Annual Exam question Paper in Physics for Class 11 conducted by KVS Chennai Region.
The question paper consists of many frequently asked questions
SESSION ENDING EXAMINATION
TIME 3 HRS
- All questions are compulsary
- There are 30 questions in total. Questions 1 to 8 carry 1 mark each. Questions 9 to 18 carry 2 marks each. Questions 19 to 27 carry 3 marks each and questions 28 to 30 carry 5 marks each.
- Use of calculators is not permitted.
******Choices are avoided as this is a question paper meant for practice ***********
********************* Read more…
A stone tied to a string of length l is whirled around a vertical circle with the other end of the string at the centre. At a certain instant of time the stone is at the lowest position and has a speed u. What is the magnitude of change in its velocity as it reaches a position where the string is horizontal?
Let’s assume that the potential energy at the lowest position be zero. So, when the string is horizontal, the stone has risen by a vertical height l, the length of the string which is also the radius of the vertical circle.
If v is the magnitude of velocity at the horizontal position, then according to the law of conservation of energy,
KE+PE at the lowest position = KE+PE at the horizontal position
From the equation above, v-u can be calculated.
The following links will help you for deeper understanding and you can browse through some solved problems from the topic too.
Categories: Answers, ANSWERS TO QUESTIONS FROM VISITORS, CLASS XI, energy loss, energy motion, Exam Help, General Physics, IIT JEE, Interesting Questions, motion work, Physics Homework, Plus Two Physics, power and energy, Problem Solving, Problems, Soved Numerical Problems Tags: Auto, centre, conservation of energy, law of conservation, law of conservation of energy, magnitude, motion, motion laws, position, stone, vertical circle, vertical height
Can you answer these?
A bullet of mass m is fired with a velocity v and strikes a a block of mass M suspended by a string of length L.
the bullet gets embedded in the block. What is the angle the the block makes due to the impact?
Why planets revolve around their own axis?
At time t=0 a ball is projected with a velocity = 60 m/s at 60 degrees form x axis.find the times when the velocity will make angle of 45 degree from x axis?
Suppose that, while lying on a beach near the equator watching the Sun set over a calm ocean, you start a stopwatch just as the top of the Sun disappears.You then stand, elevating your eyes by a height H = 1.70 metres, and stop the watch when the top of the Sun again disappears, If the elapsed time is t=11.1 s, what is the radius r of earth?
A non flow reversible process occurs for which p=3v has power 2+1/v where p is in bar & v is in m has power3. What will be the work done when v changes from 0.5 to 1.5m has power3.
Draw the ray diagram to show the image formation during looming (mirage in cold regions )?
Categories: +2 Physics, adults, Answers, Ask Physics, blue, CLASS XI, EMI, Entrance Exams, Exam Help Tags: ball, beach, block, bullet, calm ocean, cold regions, com, image formation, impact, Physical, Physics, question, ray diagram, sun, time t, www
“Can you add 3 unit vectors to get a unit vector ? discuss in terms of velocity, force etc”
The answer is yes. Please find a detailed description on addition of vectors with examples and exercises at the following links.
GRAVITATION AND WAVES
Questions 1 to 5 carries one mark each
Questions 5 to 10 carries 2 marks each
Questions 10 to 15 carries 3 marks each
Questions 16 and 17 carries 5 marks each
- What are mechanical waves?
- The time period of a vibrating source producing sound is 0.01 s. If the velocity of sound is 340 ms -1 calculate wave length
- State the principle of superposition of waves
- Why is gravitational potential energy negative?
- What is geosynchronous satellite?
- Derive a relation between wave velocity, frequency and wavelength
- What are transverse and longitudinal wave motions? Give an example for each type
- What is the effect of pressure on the speed of sound? Justify your answer.
- What is a progressive wave? Write an expression which represents a progressive wave.
- State the conditions necessary for a satellite to appear stationary.
- Define orbital velocity. Derive an expression for it.
- Define acceleration due to gravity. Show that the value of ‘g’ decreases with altitude or height
- State the laws of vibrations of stretched strings.
- Derive an expression for the escape velocity of a satellite projected from the surface of the earth.
- What is the maximum value of potential energy that can be possessed by a heavenly body? Give the general expression for potential energy of an object near the surface of earth
- State Kepler’s law of planetary motion. Deduce Newton’s law of gravitation from Kepler’s law.
- (a)What is Doppler Effect? (b) Derive an expression for the apparent frequency when a source moves towards a stationary observer. (c) A policeman on duty detects a drop of 15% in the pitch of the horn of a motor car as it crosses him. Calculate the speed of car, if the velocity of sound is 330 m/s