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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For a given string of constant length, the frequency of vibration is directly proportional to the square root of the tension. When the vibrating tuning fork is placed on it, it is set into forced vibrations.

Apparatus Osnometer as in Experiment 8 except a separate horse shoe magnet and a separate step down transformer. This is called the resonating length l. When a body is vibrating with frequency of driving force, other than its natural frequency then it has forced vibrations. Therefore, a sonometer is an instrument which measures the frequency of sound.

C sonometer is an apparatus by which the transverse vibrations of strings can be studied. Then adjust the knife edges or the magnet to get the maximum vibration.

The person touching the line is repelled. What is an electromagnet?


It is twice the frequency of the alternating current. For a string of constant length and under sonomeer constant tension, the frequency of vibration is inversely proportional to the square root of its mass per unit length.

Frequency Of AC Mains Using Sonometer

Change the position of the magnet using the slider. RD Sharma Class 12 Solutions.

A step down transformer is used for the determination of frequency of A. What is skin effect? It is that value of steady current which, when passed through a given resistor for certain time 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.

Frequency of vibration of a stretched string: Why does the string of the sonometer vibrate? For a string of a given material and length and under a constant tension, the frequency is inversely proportional to its diameter. To determine the frequency of a string first take a copper string and connect it to an A.

The string wire of the sonometer is a non-magnetic metallic wire like brass or copper.

Retrieved 31 Decemberfrom vlab. This tendency increases with the frequency of A. It is because the electromagnet is magnetised twice during one cycle of alternating current. The sonkmeter poles of the magnet must face each other. A current having magnitude changing between maximum and zero and same direction, is called unidirectional current. Main line carrying a.


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

Nodes are the points of zero amplitude and antinodes are points of maximum amplitude. Why is the instrument called a sonometer? A magnet magnetised by electric current, is called an electromagnet.

Precautions Same as in Experiment It is in the form of a hollow wooden rectangular box.

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

So a force will act on the conductor in a direction perpendicular to both the field and the direction of current. When two identical waves of same frequency, amplitude travelling in a medium with same speed but in opposite directions superpose, they produce stationary waves.

The person touching the line is attracted. What are nodes and antinodes? Theory A low alternating current passed directly through sonometer wire imposes forces on it the frequency v nu of the A.

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