Which one ? Although I m nt a cbse student.

 Ask ur doubt.

Hey I can help you!

It was my physics practical yesterday and i learnt all the observation tables. Thats what you can also do..it's really easy to learn the observation tables..If you want i can even tell you how i learnt them.

Well the readings of Angle of minimum deviation are:

Take angle i as                       angle of deviation

1. 30                                          42

2.35                                           43

3.40                                           44

4.45                                           45

5.50                                           40

6.55                                           39

7.60                                           45

You learn these values as they are..it's quite easy to learn this set. Then you have to plot a graph between angle i and angle d which is there in the lab manual.

After that calculate refractive index by the formula given in the manual. It comes out to be 1.498.

Ohm's law.

s.no           Ammeter reading                                         voltmeter reading

                  Divisions  Divisions. Least count              Divisions        Divisions.Least Count

1.                7                 0.7                                                    40                       2.0             

2.               6                  0.6                                                    38 

3.              5                   0.5                                                    34                       1.7

4.              4                  0.4

5.              3                  0.3

6.              2                  0.2                                                      10                

See..here we have to multiphy divisions with least count in the 2nd column. For the 1st column in the voltmeter reading, take values between 10to 40 in the middle such that you get a constant R for every V/I.

You can ask me in case you have some doubt.

Here least count of ammeter is 0.1 and voltmeter is 0.05.           

Metre bridge.

S.no            Resistance from resistance box        AB= l                  BC= 100- l                            X=R(100-l)/l

1.                   1                                                                30                      70                 

2.                    2                                                               40                     60

3.                   3                                                                50                     50

 You can calculate the 4th column from the 1st 3.

Then you have to interchange the 3rd and 4th column and thats the 2nd observation table of the experiment. Calculate the unknown resistance X similarly in that also.

Focal length of convex lens.

Object position         Lens position           Image needle              u              v

0                                  18                                 40.5               

0                                  21                                41.5

0                                  24                                42.5

0                                  27                                43.5

0                                  30                                44.5

0                                  33                                45.0

Calculate u by subtracting object position by lens position and v by subtracting lens position from image needle.

beta no tension in practicles

there is open cheating.

just prepare urself for viva........ u should everything about ur projest and what u have written in ur prac file.....

Combination of lenses

S.no         Distance of                      observed distance                f

                  O  L1   I     L2                   I'        u         v

1               0    20   41   27                57

2               0     23   42  30               55

3               0     26   43  33               53

Calculate u by subtracting L2 from I and L2 from I' and then calculate f.

Tell me if you want observations for any other experiment as well.

http://www.ankurb.info/2007/09/14/chemistry-qualitative-salt-analysis-cheatsheet/

Download download version 1 of salt analysis cheatsheet

Learn this cheat sheet..

For titration...you can do cheating as i also did the same..Well...i cheated in salt also..lol!

Don't worry.... If you cannot identify the salt..write about any acid and basic radical..you'll get marks...

if you need any further help...you can ask me..

All the best!