Jun 26, 2010 we did an experiment of measuring ac mains frequency using sonometer. The term monochord is sometimes used as the classname for any musical stringed instrument having only one string and a stick shaped body, also known as musical bows. A sonometer is used to determine the frequency of alternating current. Set up the sonometer and stretch the wire ab by placing a load of. The step down transformer reduces this voltage to 6 volts. The preliminary adjustments for telescope, prism and the collimator are done. Because in the experiment, u are interested in studying the relation between resonant frequency and length of vibrating string. A monochord, also known as sonometer see below, is an ancient musical and scientific laboratory instrument, involving one string. Aug 01, 2012 to determine frequency of ac mains using a sonometer and a magnet.
What is the principle involved in sonometer experiment. Objective the purpose of this experiment is to measure how normal mode frequencies of metal wires fixed at both ends vary with length, mode number, tension, and mass per unit length of the wires using a sonometer. By increasing the tension on wire, repeat the experiment for 3 or 4 different tensions. On the wooden rectangular box there are two bridges and a pulley at one end. To determine frequency of ac mains using a sonometer and a. Laws of transverse vibration of string using a sonometer duration.
It consists of the frequency is calculated using the equation. A sonometer demonstrates the relationship between the frequency of the sound produced by a plucked string, and the tension, length and mass per unit. To determine frequency of ac mains using a sonometer and a magnet. The sonometer is a device that enables you to determine the relationship between the tension or force pulling on a vibrating string and the frequency it produces and the length of a vibrating string and the frequency it produces. The potentiometer is an electric instrument that used to measure the emf electro motive force of a given cell, the internal resistance of a cell. Homework statement there is this experiment regarding the frequency of ac mains using a sonometer and i found a slight confusion with the formula. Adjust the grating for normal incidence method using the spectrometer. C sonometer is an apparatus by which the transverse vibrations of strings can be studied. Physics lab manual ncert solutions class 12 physics sample papers. Measure both ac and dc currents in all branches associated with the node a.
The objective of this experiment is to use a sonometer, which is a device that holds a single wire under a set tension and detects normal mode vibrations of the wire, to measure how the normal mode frequencies of metal wires fixed at both ends vary with. Potentiometer construction, working and applications. The potentiometer is an electric instrument used to measure the emf electromotive force of a given cell, the internal resistance of a cell. A sonometer is a device for demonstrating the relationship between the frequency of the sound produced by a plucked string, and the tension, length and mass per unit length of the string. Jan 30, 2016 the holes in the sonometer box provides a way so that vibrations from the tuning fork which is excited near the sonometer is transferred to the inside of the sonometer box. These potentiometers are used in huge quantities in the manufacture of electronics equipment that provides a way of.
List of experiments conducted in physics lab during inspire camp held during 29 th. Sonometer experiment viva questions with answers libraryaccess78 pdf keywords. Last revised on september 21, 2016 experiment 11 velocity of waves 5. For example, a simple way to find the value of an unknown component is to connect. Reviewed by fabrizio marchesi for your safety and comfort, read carefully ebooks sonometer experiment viva questions with answers libraryaccess78 pdf this our library download file free pdf ebook.
Assuming the number of lines per unit metre of the grating, determine the wavelength of green, blue and yellow lines of mercury spectrum. Frequency of ac mains using sonometer experiment pdf posted on june 7, 2019 by admin an a. For sonometer experiment, the apparatus consist of a wooden box which is hallow and has. How the amplitude was changing with the change in length of the string. It can also use as a variable resistor in most of the applications. To determine resistance per cm of a given wire by plotting a graph for potential difference versus current ohms law. The columns are instantaneous frequency, instantaneous phase change, net phase gainloss since powerup, mains hour, minute, second, and utc hour, minute, second. The list of experiments section covers to determine resistance per cm of a given wire by plotting a graph for potential difference versus current, to compare emfs of two given primary cells using potentiometer, to determine the internal resistance of given primary cell, using potentiometer, to find the frequency of alternating current ac mains. Bnc ts so the sonometer detector signals can simultaneously be seen on the oscilloscope and recorded bnc male to male for the adapters rubber squares to prevent power out of the preamps going into the sonometer sensors 2 kg weights per setup so that guitar like string tensions can be chosen. Mar 12, 2020 ac sonometer experiment pdf experiment. Frequency of ac mains using sonometer experiment pdf an a. Sonometer lab general physics i sonometer lab jonathan. For sonometer experiment, the apparatus consist of a wooden box which is hallow and has holes on the sides for free vibrations of air inside. It is in the form of a hollow wooden rectangular box.
On the wooden rectangular box there are two bridges and a. When the rate of movement due to the current matches the fundamental frequency of the wire, resonance occurs causing noticeable vibration. Nov 28, 2016 to find the frequency of the ac mains with a sonometer. Support the electromagnet in a stand and connect it to the secondary of a stepdown transformer. To study the factor affecting the rate of loss of heat of a liquid. And also it is used to compare emfs of different cells. For the sonometer, the ratio of energy content in these formants is the same as in the case of plucking at the center. Sonometer with nonmagnetic wire nichrome, ammeter, step down transformer 210 volts, key, horse shoe magnet, wooden stand for mounting the magnet, set of 50 gm masses. The normal mode frequencies depend on the 4 parameters n, l, t, and.
In the experiment an electromagnet was vibrating the string. Physics laboratory manual department of physics, bit mesra page 1 experimets no. To determine the frequency of alternating current using a sonometer. This gives a more quantitativ e characterization of the timbre of the v eena. Sonometer is device used to measure the frequency of tunning fork. Let the alternating current have frequency v so that the frequency of magnetisation of the electromagnet v e becomes 2v. With the sonometer it is possible to keep three of the parameters constant and investigate how the normal mode frequencies depend on the 4th parameter. Experiment aim to determine the frequency of alternating current using a sonometer and an electromagnet.
Aug 28, 2019 link of pdf of practical file of this experiment. Jan 29, 2012 there is this experiment regarding the frequency of ac mains using a sonometer and i found a slight confusion with the formula. Which type of waves are produced in sonometer experiment. 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 ushaped magnet. And also it is used to compare the emfs of different cells. Theory let the alternating current have frequency v so that the frequency of magnetisation of the electromagnet v e becomes 2v. Refractive index of the material of the given prism 1. So u can either replace strings with different lengths for the tong frequency u are using and hope that u have used the.
To determine the frequency of alternating current using a sonometer and an electromagnet. The stretched sonometer wire under tension is set into vibration and tuned by means of driver coil connected to a signal generator. Experiment 7 to find the frequency of the ac mains with a sonometer. A sonometer with soft iron wire, a set of eight tuning forks. Switch on the alternating current supply and adjust the length of. This experiment will be conducted using a sonometer to investigate how the frequencies of vibrating wires vary with length, density, and tension. Record the frequency of the tuning fork, and the distance from each node to the open end of the tube. A thin wire of whose linear density is known is stretched over the bridges by means of hanging weights over a pulley with other end fixed. These relationships are usually called mersennes laws after marin mersenne 15881648, who investigated and codified them. We adjusted the length of the string so that the amplitude is maximum. Stretch the wire by loading a suitable maximum mass on the weight hanger. A step down transformer is used for the determination of frequency of a. The sonometer is a device that enables you to determine the relationship between the tension or force pulling on a vibrating string and the frequency it produces and the length of a. We did a 3 part experiment last week using a sonometer and i have to write a lab report for it.
A sonometer with a soft iron wire stretched over it, an electromagnet, a stepdown. A sonometer is an apparatus used to study the transverse vibrations of stretched strings. Sadly, the gamegain trial version really have many options, but identifies your media players, and colorcoded illustration of your personal. Description a pasco sonometer which is also called a monochord was used with a detector coil, along with a voltage sensor, bnc to double. To determine the frequency of ac mains using a sonometer.
The sonometer allows accurate variation of the tension in the wire, by hanging a series of masses from the end arm, and the length of the wire by moving the bridges. Measure both ac and dc voltages across each element. Alok kumar gupta national institute of open schooling an autonomous organisation under mhrd, govt. A wire is stretched by appling tension at one end and fixing the other end to a screw that is provided. However, if the circuit is composed of just one type of passive component, then some simplified techniques can be used. It consists of the frequency is calculated using the. To find the frequency of the ac mains with a sonometer learn. Sonometer with nonmagnetic wire brass wire stretched over it, stepdown transformer of 68 volts, horse shoe magnet, meter. Sonometer with nonmagnetic wire brass wire stretched over it, stepdown transformer of 68 volts, horse shoe magnet, meter scale, screw gauge and 250gm weights.
Physics laboratory manual 312 course coordinator dr. Pdf acoustic analysis of timbre of sarasvati veena in. A second drive coil can be used to induce vibrations in the wire. To study the effect of detergent on surface tension by observing capillary rise. For this experiment i used a truetime tfdm timefrequency deviation meter card on a xl gps receiver. Not for examination to find the angle of prism to find the angle of minimum deviation procedure. These potentiometers are used in huge quantities in the manufacture of. Laboratory manual physics class 12th experimentsactivities. Potentiometer construction, working and applications elprocus.
The objective of this experiment is to use a sonometer, which is a device that holds a single wire under a set tension and detects normal mode vibrations of the wire, to measure how the normal mode frequencies of metal wires fixed. Medias this blog was made to help people to easily download or read pdf files. Measure the diameter of the wire in mutually perpendicular direction at. It consists of two bridges, near the ends, one horse shoe magnet. To determine the frequency of ac mains with the help of sonometer.
A sonometer demonstrates the relationship between the frequency of the sound produced by a plucked. To find the frequency of the ac mains with a sonometer. Science workshop resonance modes sonometer dg 1996, pasco scientific p34 1 experiment. Attach a weight hanger at the free end of the string which passes over the pulley. Adjust its position, such that its one pole lies close to the middle of the sonometer wire. Refractive index of the material of the given prism where a is the angle of the prism d is the angle of minimum deviation diagrams. Apparatus and material required a sonometer with a soft iron wire stretched over it, an electromagnet, a stepdown transformer, slotted 12 kg weights hanger, a physical balance, two sharp edge wedges and a weight box. Place the sonometer near the end of the laboratory table so that the weight hanger attached to the wire hangs freely.
According to the hornbostelsachs system, string bows are bar. The sonometer wire is connected to the secondary of the step down transformer. Physics laboratory manual 312 national institute of open. If ithe string is subjected to a distrubance it would vibrate with a certain frequency. The group i was working with in the lab didnt give me chance to help out and didnt seem keen on explaining anything to me. To find out the frequency of ac mains using a sonometer. The sonometer the resonant string and timbre change after. C mains is determined by formula for fundamental frequency. My question is that resonance was there in vibration or not. Aim to find the frequency of the ac mains with a sonometer. Frequency hz distance to node m distance to node m distance to node m calculations. To study dissipation of energy of a simple pendulum by plotting a graph between square of amplitude and time. The sonometer the resonant string and timbre change.
234 1450 1010 13 1546 1423 670 1493 392 466 958 551 629 995 1585 550 1166 323 1474 1266 62 1134 139 116 982 1541 1022 1115 938 646 1426 1162 253 1020 658 16 1125 1340 1104 697 1466 105 961 1190 397 89 389