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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Once the area of vibrating body increases the amplitude of vibration of the board wire system also increases. Let a tuning fork of frequency V T have resonant length l 2.

When the vibrating tuning fork is placed on it, it is set into forced vibrations. Retrieved 1 Januaryfrom vlab. What are nodes and antinodes?

What do you mean by one cycle of A. To make the inside air in communication with external air. When a body is vibrating with frequency of driving force, other than its natural frequency then it has forced 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.

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

To determine the frequency of a string first take a copper string and connect it to an A. When will the wire resonate? Theory Let the alternating current have frequency v so that the frequency of magnetisation of the electromagnet V E becomes 2v.


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

Due to time lag, the body polarity remains opposite to that of the main line. The step down transformer reduces this voltage to 6 volts. This tendency increases with the frequency of A. On the maine rectangular box there are two bridges and a pulley at one end. On touching it, the polarity of the body of the person also changes. The distance between the centres of two successive crests or troughs is called the wavelength of a stationary wave.

What is function of a sounding board?

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 step down transformer is used for the determination of frequency of A. C sonometer is an apparatus by which the transverse vibrations of strings can be studied.

If kinetic energy is applied to an object at a rate that matches its natural frequency, resonance occurs and the object vibrates.

What are natural vibrations? Percentage Error Same as in Experiment 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 the function of holes in the sonometer box?


What is an A.

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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. Retrieved 1 Januaryfrom amrita. For a given string of constant length, the frequency of vibration is directly proportional to the square root of the tension.

What is fluctuating current? The law of mass may be put into two additional laws, for strings of circular cross-section, as given below.

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

What is a timing fork? What are stationary waves? 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.

When two identical waves of same frequency, amplitude travelling in a medium with same speed but in opposite directions superpose, they produce stationary waves. Precautions Same as in Experiment This phenomenon flow of electron on the surface of the conductoris called skin effect.

One cycle of A.

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