0:00
5.
00:01
These questions said about the laws of vibration of stretched strings.
00:05
Now see when a string has been stretched.
00:09
So on stretching and on releasing, the string will get vibrated.
00:14
So these vibration will depend on some factors.
00:18
The factors are the length of a given string, the tensional force of the string and the mass of the string.
00:26
So these factors can be related with.
00:30
The laws of vibration right so there are three laws under this laws of vibration of stretched string so first we will see the factors name on which these vibration of stretched string depends factors are length of the string next factor is the tension that means the tension force of the string and the mass of the string so these are the factors on which the vibration of stretched string depends now the laws.
01:02
The first law is the law of length.
01:05
So according to the law of length, for a given string or wire under a given tension, the frequency of the string will vary inversely as its vibrating length.
01:18
Okay? so the frequency of the vibration of stretched string, what is frequency? as we know that, frequency is the number of oscillations.
01:30
Per unit time period okay number of oscillation number of vibrations per unit time period so this is frequency so how the frequency of the vibration of stratist string will depend will relate to the length the frequency is inversely proportional to the length of the given wire so from this we can say n into l is equal to con so in statement we will write for a given string under the tension, that means having tension force, the frequency of the string is inversely as its vibrating length.
02:12
So this is the statement for the law of length.
02:17
Now the second law of vibration is law of tension, that means how the frequency will depend on the tension force of the string.
02:26
So according to the law of tension, the frequency.
02:30
Is directly proportional to the square root of the tension that is n proportional to root over t tension is expressed as capital t the tensional force so for a uniform string of given length and material the frequency of the string varies directly as the square root of its tension so we will write it in statement for a uniform string of given length and material...