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 (Theory) : Class 12 : Physics : Amrita Online Lab

Theory A low alternating current passed directly through sonometer wire imposes forces on it the frequency v nu of the A. Which material is used to make sonometer wire?

What is unidirectional current? Therefore, a sonometer is an instrument which measures the frequency of sound. Theory Let the alternating current have frequency v so that the frequency of magnetisation of the electromagnet V E becomes 2v.

It is in the form of a hollow wooden rectangular box. This will be the frequency of the stretched string. A string, often a copper wire, is fastened at one end that runs over the bridges and the pulley, and attached to a weight holder hanging below the pulley. What are forced vibrations? When a body is vibrating with its own natural way then it has natural vibrations.

A horse shoe magnet is placed at the middle of the sonometer wire so that the magnetic field is applied perpendicular to the sonometer wire in a horizontal plane. Percentage Error Same as in Experiment For an alternating current having maximum peak value 70.


To Find the Frequency of the AC Mains With a Sonometer

What do you mean by A. Derivation of the equation: Aim To find the frequency of the AC mains with a sonometer. By knowing the linear density, m, of the wire, the frequency of A. The sonometer wire is connected to the secondary of the step down transformer.

When the natural frequency of a particle is equal to the frequency of driving force, then resonance takes place. One cycle of A. Students will be able to derive the relationship between frequency of alternating current and the resonating length of the wire.

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

Then adjust the knife edges or the magnet to get the maximum vibration. Weights can be added to experimrnt holder to produce tension on the wire and the bridges can be moved to change the length of the vibrating section of the string. The graph between mass M of the suspended weights and square of the resonating length l2 by taking M along X-axis and l2 along Y-axis is drawn.

If M is the mass and L is the length of the string then. Select the diameter of the wire using the slider.

Main line carrying a. On the wooden rectangular box there are two bridges and a pulley at one end. This phenomenon flow of electron on the surface of the conductoris called skin effect.

Change the position of the magnet using the slider. When will the wire resonate? When an alternating current of definite snoometer passes through the wire there will be interaction between the magnetic field and the current carrying conductor. C sonometer is an apparatus by which the transverse vibrations of strings can be studied.


When a body is vibrating with frequency of driving force, other than its natural frequency then it has forced vibrations. Let a loaded stretched soft iron wire have resonant length l 1 for the main frequency.

Because it is a ferromagnetic material.

Frequency Of AC Mains Using Sonometer

A magnet magnetised by electric current, is called an electromagnet. Retrieved 31 Decemberfrom amrita. 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.

When two identical waves of same frequency, amplitude travelling in a medium with same speed sknometer in opposite directions superpose, they produce stationary waves. Precautions Same as in Experiment When the vibrating tuning fork is placed on it, it is set into forced vibrations. The graph should be a straight sloping line.

Change the position of bridge A using the slider. What is a timing fork?

The graph should be a straight sloping line. Give expression for r.