Video and Theory on Ray Tracing

This video shows the rays wch are used in drawing the ray diagrams for the lenses. Infact this video uses three rays to help us locate the image with the help of the ray diagram:

(i) One wch travels parallel to the pricipal axis after refraction passes through the principal focus,

(ii) One wch travels thru the optical center goes undeviated, and

(iii) Ray passing thru principal focus after refraction goes parallel to the principal axis.

Aid to ur memory (P, C, F)

This particular video shows the rays used for image location in case of concave lenses, still they are the same P, C and F.

But in fact in real practise I always prefer to use the first two rays for locating any image :)

The different image located for different position of the object is shown below: (Probably this u all hav done at class Xth level)....

But just for ur revision I discuss in the class....

Types of Lenses

This video discuss about the type of the lenses tht has been taught to you earlier in the class comprehend this video with the notes...

Video on Factors affecting a Parallel Plate Capacitor

This video in particular explains about the factors wch effects the capacitance of the capacitor, namely the area of the plates, distance between the plates and the nature of the medium separating the plates.
I'm also impressed about the type of parallel plate being used in this video. In most of the text bk example and numerical we just focus and talk about the parallel plate being rectangular but infact they can be of any geometrical shape, in this particular example a circular shaped plates are being used, but can be some other planar shaped also. This idea can be used in framing numericals. Just remember the formula for the area of the shape given. In this case its being circular hence area (A=pi.r^2), rest formula for the capacitance remains the same.

Video on Capacitance Variation with distance

Another video wch shows the variation in the capacitance of capacitor with distance

Videos on Capacitance

This video gives a preliminary idea about capacitors

Good video showing a parallel plate capacitor and how its capacitance varies when dielectric such as water is being introduced between the plates. Notice the area of the plates (A) and distance of separation (d) between the plates.

Test Paper & Solution – Electrostatics

The solution of the test conducted on SUNDAY 22nd May 2010, Question ppr is also attached for reference…

Solution of Numericals from Capacitance (01-15)

Here are some of the selected numerical's solutions which are taken from the chapter of Capacitors and Capacitance of Nootan Physics ISC. Click on any image to enlarge... Right Click to Save....

 Page - 1 Q.01-Q.15   Page - 2 Q.16-Q.20 
 Page - 3 Q.21-Q.25   Page - 4 Q.26-Q.30 
 Page - 5 Q.31-Q.40   Page - 6 Q.41-Q.52 

• Looking for Notes on Capacitor and Capacitance << Click Here
• Looking for notes on Energy Stored in Capacitors << Click Here

 

Lecture Notes on Capacitance

Here are some of the formula's which can be used while solving the numericals...

Variations of C, V and Q for an air capacitor when dielectric slab is inserted between the plates of Capacitor. The discussion shows both the conditions (i) when the battery is removed and then the dielectric slab is inserted and (ii) when the battery remain connected and then the dielectric slab is inserted.

Many Numerical Problems are based on such concepts and they are generally a favorable thinking ground for question framing. So master this concept well for any of your examinations.
 Also Read 

• Energy Density of parallel plate capacitor
• Capacitance of partially filled dielectric capacitor

 Test Your Knowledge 

      Paper 1