More data, this time, for the Class XII Physics Demonstrations…
Internal diameter of coil = 0.14 m
External diameter of coil = 0.1414 m
Least count of ammeter = 0.25 A
Zero error of ammeter = 0 A
S. No. |
Number of turns (n) |
Current (I) |
Deflection (θ) |
tan θ |
1 |
2 |
0.75 |
22.5 |
0.4142 |
2 |
2 |
1.5 |
40 |
0.8391 |
3 |
2 |
1.75 |
45 |
1 |
4 |
2 |
2 |
50 |
1.91 |
Calculations:
Mean diameter of coil = 0.14 m
Mean radius of coil = 0.07 m
Value of horizontal component of Earth’s magnetic field:
- H1 = 3.24 x 10^-5 tesla
- H2 = 3.2 x 10^-5 tesla
- H3 = 3.14 x 10^-5 tesla
Mean value of H = 3.19 x 10^-5 tesla
Result:
Experimental value of H = 3.19 x 10^-5 tesla
Actual value of H = 3.2 x 10^-5 tesla
Difference = 0.01 x 10^-5 tesla
% error = 3.125%
Refractive Index Demonstration
Rough focal length of convex lens = 10 cm
Arrangement |
Height of tip of optical needle |
Focal length (x cm) |
||
from lens surface x1 cm |
from plane mirror x2 cm |
Mean x cm |
||
Convex lens on plane mirror |
9.8 |
10.2 |
10 |
fg = 10 |
Convex lens on plane mirror with water in between |
14.8 |
15.2 |
15 |
F = 15 |
Convex lens on plane mirror with glycerol in between |
20.8 |
21.2 |
21 |
F = 21 |
Calculations:
- R = f = 10 cm
- fwater = -30 cm
- fglycerol = -19 cm
- Refractive index of water = 1.33
- Refractive index of glycerol = 1.53
15 replies on “CBSE Class 12 Physics Demonstration Data”
I didn’t found the demonstration experiment based on induced emf & diffraction of light
i need a class 12 physics demonstration file without any calculation and observation table!!!
pls help!!!
THANX, WHREVR U R BUDDY………………………..
bhai.. demonstration files bhi upload karde pk\zzz
Thanks a lot Sirji!!!!i myself am frm DPS Vk…got my prac next week n abhi tak file ka koi ata pata nahi hai…I owe u truly