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Experiment: MELDE’S EXPERIMENT. Object: To determine frequency of A.C. mains using Sonometer. Apparatus: • A sonometer with a steel. Theory Let the alternating current have frequency v so that the frequency of All precautions of sonometer experiment should be observed. EXPERIMENT. AIM. To determine the frequency of alternating current using a sonometer and an electromagnet. APPARATUS AND MATERIAL REQUIRED.

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AC Sonometer (Procedure) : Class 12 : Physics : Amrita Online Lab

When an alternating current of definite frequency passes through the wire there will be interaction between the magnetic field and the current carrying conductor. A sonometer is an apparatus used to study the transverse vibrations of stretched strings. When a body is vibrating with frequency of driving force, other than its natural frequency then it has forced vibrations. What is frequency of alternating current supplied to us in our houses? It is found that in an alternating current, the tendency of the moving electrons is to drift towards the surface of the conductor while moving along its axis.

When a body is vibrating with its own natural way then it has natural vibrations. Students will be able to derive the relationship between frequency of alternating current and the resonating length of the wire. Why is frequency of magnetisation of electromagnet double of that of the alternating current? Because it is a ferromagnetic material. For a given string under constant tension, the frequency of vibration is inversely proportional to the length of the string. Unit of frequency of A.


When the vibrating tuning fork is kept on the board of the sonometer, the forced vibrations of the board communicate energy to the string which in turn is set into forced vibrations. What is a timing fork? Define root mean square or virtual or effective value of alternating current.

Our Objective:

Theory Let the alternating current have frequency v so that the frequency of magnetisation of the electromagnet V E becomes 2v. When two identical waves of same frequency, amplitude travelling in a medium with same speed but in opposite directions superpose, they produce stationary waves. One cycle of A. A step down transformer is used for the determination of frequency of A.

At this stage, the length of the wire segment is called the resonating length and it increases with increase in the mass of the suspended weights. C sonometer is an apparatus by which the transverse vibrations of strings can be studied.

A string, often a copper wire, is sinometer at one end that runs over the bridges and the pulley, and attached to a weight holder hanging below the pulley. What do you mean by A. Aim To find the frequency of the A.

Nodes are the points of zero amplitude and antinodes are points of maximum amplitude. Change the position of bridge A using the slider. The wire begins to vibrate.

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The step down transformer reduces this voltage to 6 volts. Every object has a natural frequency of vibration. Change the position of bridge B using the slider. Derivation of the equation: Give demerits disadvantages of A. To determine the frequency of a string first take a copper string and connect it to an A.

Main line carrying D. Slnometer magnet magnetised by electric current, is called an electromagnet. What is an electromagnet?

The current is A. Select the material of the wire from the drop down list. Give expression for r. If M is the mass and L is the length of the string then. Sonometeg a string of a given material and length and under a constant tension, av frequency is inversely proportional to its diameter. What is the natural frequency of sonometer wire? The frequency with which the body vibrate is, called its natural frequency.

Simulator Procedure as performed through the Online Labs Select the sonlmeter from the drop down list. A wire string is attached to one end of the wooden box, run over the bridges and pulley and carries a weight hanger at the free end as shown in figure below.