2011 Q.Ppr

2012 Q.Ppr

2013 Q.Ppr

Solution of Projectile Problems

Here are some of the selected solutions from the projectile motion:

You can notice in the video below, when any projectile is thrown from the ground level then for angle of projection of 45°, the range is maximum. Also one can easily notice that for angle of projections being complementary pair (e.g.15° & 75°pair, 30° & 60° pair etc.) the range of the projectile remains same.

One should also appreciate and notice an important fact of projectile motion under the influence of gravitational field (ball thrown in air making some angle etc) that the x-component of velocity remains unchanged as there is no component of acceleration acting on it, while the y-component of velocity first decreases during the upward flight of the motion and then increases during the downward flight of the motion. This fact is documented wonderfully in the video below, both by the vector diagram as well as by the graphs.

Click Here to see the video solution of the selected problems... 

Dimensional analysis

Here are the solutions from the chapter of dimensional analysis.

Ray Optics

Derivation of the Lens Maker Formula

Behaviour of lens when immersed in Liquid.

Selected Solution of Numerical Problems from Chapter 15) Refraction through plane interface

Here are the selected solution for the numerical problems on the chapter refraction at the plane surface from Nootan Physics.

Q.7) Chapter 15

Q.8) Chapter 15

Q.10) Chapter 15

Q.11) Chapter 15

Q.14) Chapter 15

Q.16) Chapter 15

Q.17) Chapter 15

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Discussion of certain solved examples from Chapter 15) Refraction of Light through Plane Interface, from very old edition of Nootan Physics text book.

Ex.9) Chapter 15

Ex.13) Chapter 15

Ex.21) Chapter 15

Numerical Solutions from Chapter Huygens Principle

In this post there are solution to commonly asked numerical problems from book of Nootan Physics chapter Huygens Principle.

Electric Potential Energy and Electric Potential

Important formula regarding electric potential energy and electric potential which will be useful.