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.
|Published (Last):||27 March 2008|
|PDF File Size:||5.70 Mb|
|ePub File Size:||19.34 Mb|
|Price:||Free* [*Free Regsitration Required]|
Theory Let the alternating current have frequency v so that the frequency of magnetisation of the electromagnet V E becomes 2v. It is twice the frequency of the alternating current. A current having changing magnitude but not becoming zero and same direction, is called fluctuating current. When the rate of movement due to the current matches the fundamental frequency of the wire, resonance occurs causing noticeable vibration.
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. What is the natural frequency of sonometer wire?
To Find the Frequency of the AC Mains With a Sonometer
Give merits advantages of A. 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. 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.
Precautions Same as in Experiment Due to time lag, the body polarity remains opposite to that of the main line. What is an A. Then the resonance takes place and the wire vibrates with maximum amplitude. What do you mean by one cycle of A. Why is the instrument called a sonometer? 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. A wire string is attached to one end of the wooden box, run over maibs bridges and pulley and carries a weight hanger at the free end as shown in figure below.
A current having magnitude changing between maximum and zero and same direction, is called unidirectional current.
Howls frequency of magnetisation of the electromagnet related with frequency of the alternating current which magnetises it? What is skin effect? Define root mean square or virtual or effective value of alternating current.
To Find the Frequency of the AC Mains With a Sonometer – Learn CBSE
RD Sharma Class 12 Solutions. Every object has a natural frequency of vibration. What are natural vibrations? What is unidirectional current?
Frequency Of AC Mains Using Sonometer
Percentage Error Same as in Experiment A step down transformer is used for the determination of frequency of A. The current is A. The string wire of the sonometer is a non-magnetic metallic wire like brass or copper. Weights can be added to the holder to produce tension frequeency the wire and the bridges can be moved to change the length of the vibrating section of the string.
AC Sonometer (Theory) : Class 12 : Physics : Amrita Online Lab
What is a timing fork? A sonometer is used to determine experriment frequency of alternating current. When will the wire resonate? Apparatus Same as in Experiment 8 except a separate horse shoe magnet and a separate step down transformer.
For a string of a given length and diameter and under constant tension, the uxing is inversely proportional to the square root of the density of the material of the string. What are forced vibrations? Aim To find the frequency of the A. What is frequency of alternating current supplied to us in our houses? Define wavelength for a stationary wave. It is because the electromagnet is magnetised twice during one cycle of alternating current.
It consists of two bridges, near the ends, one horse shoe magnet at the middle and at one end is a pulley. Let a loaded stretched soft iron wire have resonant length l 1 for the main frequency. Main line carrying a. Because it is a ferromagnetic material. C sonometer is an apparatus by which the transverse vibrations of strings can be studied.
Nodes are the points of zero amplitude and antinodes are points of maximum amplitude.