Sonometer for standard 12 Physics Practical

Sonometer

AIM :-
To study the relation between frequency and the length of a stretched string with the help of a sonometer.

PRECAUTIONS :-
The wire should be of uniform cross-section and there should not be any twist or bend in it.
The pulley should rotate without friction.
Put that much weight in the pan so that the deformation produced in the wire should not exceed the elastic limit.
The stem of the tuning fork, not its prongs, should be placed on the sonometer box or on the support.

Apparatus:-    A sonometer,
                       tuning forks ( of frequencies from 256 Hz – 512 Hz), 
                       a pan or a hanger of known weight,
                       four to five 500 gm weights,
                        a paper rider,
                       a rubber-pad and
                       a meter rule. 

Sonometer

         
          









OBSERVATION TABLE

Sonometer Observation table

Graph:-

Graph of Sonometer

 

Sonometer Presentation

Frequency of Aelternating Current For Standard 12 Physics

Frequency of A.C.

AIM :-

To find the frequency of the alternating current with the help of a sonometer.

Sonometer Aim

PRECAUTIONS :-

It  is not advisable to use sonometer wire made of iron or any other magnetic materials.

The measurement of radius of the wire should be carried out precisely.

The transformer key should be switched off after every observation.

 The wire should be kept exactly in the middle between the magnetic poles.

      The wire should be of uniform cross-section and it should not have a twist or a bend.

Sonometer Precaution

Apparatus  :-         A sonometer,  

                                horse-shoe magnet,

                                a transformer,

                                a pan,

                                weights and

                                a micrometer screw.

Sonometer Apparatus

Sonometer Wiring diagaram

 

OBSERVATION TABLE

Sonometer Observation Table

  

Calculation:-

The linear density (i.e. mass per unit length) of the wire, m= prrr = . 

Calculation of √T/L.

The frequency of alternating current f = 1 / 2L √T / m = 1 / 2 √m * (average √T/L )

Sonometer 

(Frequency of Aulternating Current)

Presentation