CBSE Class 11 Physics Question Paper Set Q Solved

CBSE Class 11 Physics Question Paper Set Q Solved. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

1 What is the work done by centripetal force in moving a body through half cycle on the circular path of radius 35 m?

2 A constant retarding force of 50 N is applied to a body of mass 20 kg moving initially with a speed of 15 ms-1. How long does the body take to stop?

3 A boat is likely to capsize if the persons in the boat stand up. Why?

4 Draw the position time graph for two objects having zero relative velocity.

5 Why are we hurt less when we fall on a heap of sand than when we fall on a cemented floor?

6 A force F = (5i + 4j) N displaces a body through s = (3i + 4k) m in 3s. Find the power.

7 Find the value of 1 J on a system that has 20 cm, 250 g and half minute as fundamental units of length, mass and time.

8 A spring balance is attached to the ceiling of a lift. A man hangs a bag, having a mass of 5 kg, on the spring. What will be the reading of the spring balance if:

(i) Lift moves downwards with an acceleration of 5 m/s2.

(ii) It moves upwards with an acceleration of 5 m/s2.

9 Draw a graph showing the variation of force of friction acting on a body with applied external force.

Show static friction, limiting friction and kinetic friction on the graph.

10 What are conservative and non-conservative forces? Give one example of each. 

11 Assuming that the escape velocity from a planet depends on gravitational constant ‘G’, radius of the planet ‘R’ and its density ‘d’, derive the formula for escape velocity using dimensional analysis method.

12 Using calculus, derive the three equations of uniformly accelerated motion.


OR


State parallelogram law of vector addition. Find the magnitude and direction of the resultant of two vectors A and B, which make an angle o with each other.

13 Show that the total mechanical energy of a body falling freely under gravity is conserved. 

14 (i) What are systematic errors? How can they be eliminated? Give an example.

(ii) If the errors involved in the measurement of a side and mass of a cube are 3 % and 4 % respectively, what is the maximum permissible error in the density of the material?

15 State and prove the work energy theorem for a variable force.


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