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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A current having magnitude changing between maximum and zero and same direction, is called unidirectional current. For an alternating current having maximum peak value 70.

Frequency Of AC Mains Using Sonometer

In this experiment a small current, produced by a signal generator, causes the sonometer wire to move up and down due to interaction with the magnetic field of a U-shaped magnet. When the vibrating tuning fork is placed on it, it is set into forced vibrations. 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. What is fluctuating current?

How does the wire begin to vibrate in this case? The person touching the line is repelled. When the natural frequency of a particle is equal to the frequency of driving force, then resonance takes place.

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

When the frequency of A. What is the function of holes in the sonometer box? On touching it, the polarity of the body of sonomwter person also changes.

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What is frequency of alternating current supplied to us in our houses? The vibrations are called resonant vibrations. The frequency is 50 hertz Hz [hertz means cycles per sec.

So expeirment force will act on the conductor in a direction perpendicular to both the field and the direction of current. Frequency of vibration of a stretched string: A sonometer is used to determine the frequency of alternating current. It is because the electromagnet is magnetised twice during one cycle of alternating current. RD Sharma Class 12 Solutions. Theory A low alternating current passed directly through sonometer wire imposes usihg on it the frequency v nu of the A.

It consists of two bridges, near the ends, one horse shoe magnet at the middle and at one end is a pulley. Due to time lag, the body polarity remains opposite to that of the main line.

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It is that value of steady current which, when passed through a given resistor for certain time time of one complete cyclesonometef produce the same quantity of heat as the given alternating current shall produce when passed through same resistor for sonometeg time. Once the area of vibrating body increases the amplitude of vibration of the board wire system also increases. Main line carrying a. What is a timing fork? In very high frequency A.

Give demerits disadvantages of A. Define wavelength for a stationary wave. A wire string is attached to one end of the wooden box, run over the bridges and pulley and carries a weight hanger at the free end as shown in figure below. The law of mass may be put into two additional laws, for strings of circular cross-section, as given below. Why does the string of the sonometer vibrate? 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.

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What is an A. Aim To find the frequency of the AC mains with a sonometer. Apparatus Same as in Experiment 8 except a separate horse shoe magnet and a separate step down transformer.

Which material is used to make sonometer wire? A timing mans is metallic bar bent into U-shape and having a heavy steps attached to the middle of the bent portion. What are nodes and antinodes? The current is A. 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.

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. What is unidirectional current? What do you mean by one cycle sonomster 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. This experimenr flow of electron on the surface of the conductoris called skin effect.