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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The person touching the line is attracted. What do you mean by one cycle of A. It consists of two bridges, near the ends, one horse shoe magnet at the middle and at one end is a pulley.

When the vibrating tuning fork is placed on it, it is set into forced vibrations. What is an A. To determine the frequency of alternating current using a sonometer.

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

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. The person touching the line is repelled. For a string of constant length and under a constant tension, the frequency of vibration is inversely proportional to the square root of its mass per unit length.

If kinetic energy is applied to an object at a rate that matches its natural frequency, resonance occurs and the object vibrates. For a given string of constant length, the frequency of vibration is directly proportional to the square root of the tension. A sonometer is an apparatus used to study the transverse vibrations of stretched strings.

C sonometer is an apparatus by which the transverse vibrations of strings can be studied. On the wooden rectangular box there are two bridges and a pulley at one end. The vibrations are called resonant vibrations.


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 the natural frequency of a particle is equal to the frequency of driving force, then resonance takes place.

Aim To find the frequency of the AC mains with a sonometer. The natural frequency usinng oscillation for a stretched wire of length L and mass m and tension T is. Theory Let the alternating current have frequency v so that the frequency of magnetisation of the electromagnet V E becomes 2v.

This will be the frequency of the stretched string. Main line carrying D. When an alternating current of definite frequency passes through the wire there will be interaction between the magnetic field and the current carrying conductor. What is a timing fork? Retrieved 1 Januaryfrom vlab.

The frequency with which the body vibrate is, called its natural frequency. When the rate of movement due to the current matches the fundamental frequency experjment the wire, resonance occurs causing noticeable vibration. Retrieved 1 Januaryfrom amrita. Steady current is the current whose magnitude and direction does not change with time. One cycle of A. Give expression for r.

The step down transformer reduces this voltage to 6 volts. The graph should be a straight sloping line.

So a force will act on the conductor in a direction perpendicular to both the field and the direction of current. The current is A. Weights can be added to the holder to produce tension on the wire and the bridges can be moved to change the length of the vibrating section of the string.

Our Objective:

It is because the electromagnet is magnetised twice during one cycle of alternating current. In very high frequency A. Because it is a ferromagnetic material. Theory A low alternating current passed directly through sonometer wire imposes forces on it the frequency v nu of the A. It is in the form of a hollow wooden rectangular box.


How does the wire begin to vibrate in this case? What is the unit of frequency of A. Every object has a natural frequency of vibration. Percentage Error Same as in Experiment What is fluctuating current?

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

The frequency is 50 hertz Hz [hertz means cycles per sec. The experimenh of mass may be put experimrnt two additional laws, for strings of circular cross-section, as given below. 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.

To make the inside air in communication with external air. Then adjust the knife edges or the magnet to get the maximum vibration. Due to time lag, the body polarity remains opposite to that of the main line.

Frequency Of AC Mains Using Sonometer

Which material is used to make sonometer wire? When will the wire resonate? It is that value of steady current which, when passed through a given resistor for certain sonoometer time of one complete cycleshall produce the same quantity of heat as the given alternating current shall produce when passed through same resistor for same time.

Give demerits disadvantages of A.