Experiment No. 4
Object
To determine the modulus of rigidity of wire by Maxwell ‘ s Nedle.
Apparatus Required .
Maxwell ‘ s Nodle , screwgauge , used wire meter scale stopwatch , physical valance & waitbox.
Used formula
The
modulus of rigidity of material of wire is given by –
Where
l = the length of the experiment were .
L = the length of gross tube.
R = the radius of wire.
Mh = the mass of each follow cylinders.
Ms = the mass of each solid cylinder.
T1 = the time period when solid cylinder are placed in the middle.
T2 = the time period when hollow cylinder are placed in the middle.
Radios of wire.
Observation table.
(A) When solid cylinder are placed in the middle-
|
S. No. |
No. of oscillation |
Time t (sec) |
Time period |
Mean Time period (T1) (sec) |
|
1. |
5 |
18 |
3.6 |
|
|
2. |
10 |
37 |
3.7 |
3.625 |
|
3. |
15 |
54 |
3.6 |
|
|
4. |
20 |
73 |
3.6 |
|
|
|
|
|
|
|
(B) When hollow cylinder are placed in the middle –
|
S. No. |
No. of oscillation |
Time t (sec) |
Time period |
Mean Time period (T2) sec |
|
1. |
5 |
24 |
4.8 |
|
|
2. |
10 |
47 |
4.7 |
4.745 |
|
3. |
15 |
71 |
4.73 |
|
|
4. |
20 |
95 |
4.75 |
|
Calculation .
Result
The
modulus of the rigidity of material of wire is 0.2704912086x10⁷ N/meter square
1. The wire should be fairely thin & long
2. It should be free from the pinks .
3. The wire should be twisted through a very small angle.
4. The motion of the nidle should be purely rotation & no portion of cylinder should project outwards.
Note.
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कृपया ध्यान दीजिये जो एक्सपेरिमेंट न दिख रहा हो वो आप सर्च बॉक्स में सर्च कर लीजिये . जैसे , एक्साप्रिमेंट नंबर.3