February 17, 2019


An A.C sonometer is an apparatus by which the transverse vibrations of strings can be studied. It consists of The frequency is calculated using the equation. EXPERIMENT. AIM. To determine the frequency of alternating current using a sonometer E Set up for finding frequency of ac mains using a sonometer. Experiment: MELDE’S EXPERIMENT. Object: To determine frequency of A.C. mains using Sonometer. Apparatus: • A sonometer with a steel.

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What is fluctuating current? To determine the frequency of alternating current using a sonometer.

Our Objective:

Give merits advantages of A. Then the resonance takes place and the wire vibrates with maximum amplitude.

This phenomenon flow trequency electron on the surface of the conductoris called skin frequsncy. When a body is vibrating with frequency of driving force, other than its natural frequency then it has forced vibrations. 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. What is frequency of alternating current supplied to us in our houses?

Frequency of vibration of a stretched string: 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.


To make the inside air in communication with external air. Retrieved 1 Januaryfrom amrita.

Frequency Of AC Mains Using Sonometer

Let a loaded ca soft iron wire have resonant length l 1 for the main frequency. A sonometer is an apparatus used to study the transverse vibrations of stretched strings.

Derivation of the equation: What is the natural frequency of sonometer wire? The frequency is 50 hertz Hz [hertz means cycles per sec. On touching it, the polarity of the body of the person also changes. What is skin effect? Weights can be added to the holder to produce tension on the wire and the bridges epxeriment be moved to change the length of the vibrating section of the string.

To Find the Frequency of the AC Mains With a Sonometer – Learn CBSE

What is unidirectional current? The frequency with which the body vibrate is, called its natural frequency. The graph should be a straight sloping line. A sonometer is used to determine the frequency of alternating current. One cycle of A.

The step down transformer reduces this voltage to 6 volts. To determine ueing frequency of a string first take a copper string and connect it to an Frrequency. A magnet magnetised by electric current, is called an electromagnet.

When a current carrying wire is placed in magnetic field then magnetic force act on the wire which tends to move it in a direction which is perpendicular to current and field. Then adjust the knife edges or the magnet to get the maximum vibration.


What is the function of holes in the sonometer box? When the rate of movement due to the current matches the fundamental frequency of the wire, resonance occurs causing noticeable vibration.

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

The distance between the centres of two successive crests or troughs is called the wavelength of a stationary wave. Why is frequency of magnetisation of electromagnet double of that of the alternating current? Theory Let the alternating current have frequency v so that the frequency of magnetisation of the electromagnet V E becomes 2v.

On the wooden rectangular box there are two bridges and a pulley at one end. What are natural vibrations? Aim To find the frequency of the A. When will the wire resonate? It is because the electromagnet is magnetised twice during one cycle of alternating current.