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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RD Sharma Class 12 Solutions. Steady current is the current whose magnitude and direction does not change with time. When the vibrating tuning fork is placed on it, it is set into forced vibrations. When a body is vibrating with frequency of driving force, other than its natural frequency then it has forced vibrations. For a given string under constant tension, the frequency of vibration is inversely proportional to the length of the string.

Nodes are the points of zero amplitude and antinodes are points of maximum amplitude. What is the natural frequency of sonometer wire?

Theory A low alternating current passed directly through sonometer wire imposes forces on it the frequency v nu of the A. When will the wire resonate? Define root mean square or virtual or effective value of alternating current. To determine the frequency of a string first take a copper string and connect it to an A.


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

Why does the string of the sonometer vibrate? A magnet magnetised by electric current, is called an electromagnet. For an alternating current having maximum peak value 70.

What do you mean by A. Aim To find the frequency of the A. Apparatus Same as in Experiment 8 except a separate horse shoe magnet and a separate step down transformer. A step down transformer is used for the determination of frequency of A.

This tendency increases with the frequency of A. When a body is vibrating with its own natural way then it has natural vibrations. A wire string is attached to one experimen of the wooden box, run over the bridges and pulley and carries a weight hanger at the free end as shown in figure below.

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Theory Let the alternating current have frequency v so that the frequency of mainss of the electromagnet V E becomes 2v. Why zonometer the instrument called a sonometer? Once the area of vibrating body increases the amplitude of vibration of the board wire system also increases.

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.

Frequency Of AC Mains Using Sonometer

The person touching the line is repelled. When two identical waves of same frequency, amplitude travelling in a medium with same speed but in opposite directions superpose, they produce stationary waves. This will be the frequency of the stretched string.


What is a timing fork? The natural frequency of oscillation for a stretched wire of length L and mass m and tension T is. The frequency with which the body vibrate is, called its natural frequency.

If M is the mass and L is the length of the string then. Then adjust the knife edges or the magnet to get the maximum vibration.

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

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

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.

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