Physics practical class 12 for board examination 2019 20. Meter bridge formula and finding the values of unknown resistance. Click here to visit our frequently asked questions about html5. Meter bridge series and parallel circuits capacitance scribd. Meter bridge specific resistance by anshu kapoorpart i. To understand how to find resistance of a given wire using metre bridge and to determine the. And also it is used to compare emfs of different cells.
Meter bridge also known as slide wire bridge is used to find the unknown resistance of a material. Physics cbse practical file class 12 with accurate readings. If we are doing the meter bridge experiment in the lab, by adjusting the value of resistance box the galvanometer. The meter bridge works under the principle of the wheatstone bridge. To find resistance of a given wire using metre bridge physics. The terminal b is connected to one ter minal of the galvanometer g. The metre bridge precautions when using a metre bridge 1 the value of the known resistance s should be chosen so that the balance point comes somewhere on the middle third of the wire, i. With your download, get the 8 best papers relevant to this one, including 7 top related papers. Now you can select your desired resistance from the resistance box just by clicking on the box and then choosing the resistance from the popwindow, select resistance. 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. In the meter bridge experiment, balance point was observed at j with aj l. Metre bridgeresistance of a wire meity olabs youtube.
This video explains how to find the resistance of a given wire using a metre bridge and hence determine the specific resistance of its materials. Class 12th practical physics experiment of finding the specific resistance of a wire using meter bridge by anshu kapoor part i donate with paytm. Figure below shows a schematic diagram of a meter bridge. The class 12 cbse ncert physics book pdf download explains concepts in a chapterwise format, thus leaving no stone unturned were preparing for the cbse board examinations are concerned. Aug 29, 2017 spread the love determining the resistance per cm of a given wire by plotting a graph of potential difference versus current finding the resistance of a given wire using meter bridge and hence determine resistivity of its material to verify laws of combination parallel of resistance using meter bridge to verify the laws of combination continue reading physics. In this bridge one lateral pair of resistances is replaced by a straight wire of length 1m of uniform cross section. Jan 07, 2016 meter bridge determination of specific resistance experiment edunovus online smart practicals. Its working is based on the principle of wheatstone bridge. The metre bridge, also known as the slide wire bridge consists of a one metre long wire of uniform cross sectional area, fixed on a wooden block. Jan 12, 2020 a potentiometer is a passive electronic component. A one meter length wire, made of an alloy that has a much higher resistance than that of a similar copper wire, is strung between points a and d, forming the lower part of the circuit. Physics practical file with readings class 12 cbse. A meter bridge is the practical application of wheatstone bridge arrangement as shown in figure below.
The four resistances are connected to each other as shown. The practical diagram is shown in the below figure. A potentiometer is an electric device used to measure the emf and internal resistance of a cell, to compare emf of two cells and a potential difference between two points in an electric circuit. Investigatory projects physics class 12 cbse pdf investigatory projects physics class 12 cbse. Jan 27, 2018 meter bridge experiment class 12, 2018. A meter bridge, galvanometer, one way key, a resistance box, a battery jockey, unknown resistance wire about 1 meter long, screw gauge and connecting wires. In a potentiometer, the entire input voltage is applied across the whole length of the resistor, and the output voltage is the voltage drop between the fixed and sliding contact as shown below. Nov 25, 2016 cut the resistance wire at the points where it leaves the terminals, stretch it and find its length by using a metre scale. Measure the diameter of the wire at least at four places, in two mutually perpendicular directions at each place with the help of screw gauge. Jun 23, 2015 physics investigatory project on wheatstone bridge. It works in the principle of the balanced condition of wheatstone bridge. The other terminal of the galvanometer is connected to a jockey j.
Measurement of unknown resistance using careyfosters bridge debangshu mukherjee bs. The class 12 physics cbse ncert free pdf download is primarily designed for students who are preparing for their upcoming class 12 cbse board exams. Recent questions tagged meterbridgeandpotentiometer. The 3,869 meter bridge is currently under construction and will be the longest suspension bridge in the world by the length of its main span of 2,023 meters. To find resistance of a given wire using metre bridge and. Meter bridge article about meter bridge by the free dictionary. Thank you very much for physics and chemistry practicals are you sure you want to yes no. Dec 04, 2015 ii in the meter bridge experimental set up, shown in the figure, the null point d is obtained at a distance of 40 cm from end a of the meter bridge wire.
Repeat the experiment with different values of known resistance r. To find the resistance of a given wire using a metre bridge and hence determine the specific resistance of its materials. A mean value of the unknown resistance calculated will be considered as the value of unknown resistance. What would be the new position of balance point ii if the galvanometer and battery are interchanged at the balance position, how will the balance point get affected. Drag one of the wires to the right gap of the metre bridge. A meter bridge is an apparatus utilized in finding the unknown resistance of a coil. The null point can be obtained at the same point as before by decreasing the value of the standard resistance. The metre bridge physics homework help, physics assignments. Nov 28, 2016 class 12 computer practicals class 12 chemistry practicals class 12 physics practicals here you go. To find the resistance of a given wire using metre bridge you are herehomephysics class 12 metre bridge resistance of a wire. So the resistance across the portion ab of the wire is r w l 1 and that the resistance across the point bc is r w 100 l 1. Important questions for cbse class 12 physics kirchhoffs. Meter bridge experiment using wheatstone bridge principle. Finding the resistance of a given wire using meter.
In above figure ac is a 1m long wire made of maganin or constanan having uniform area of cross. Meter bridge study material for iit jee askiitians. It is the simplest practical application of the wheatstone bridge that is used to measure an unknown resistance. Meter bridge determination of specific resistance experiment edunovus online smart practicals. Meterbridge slide wire bridge meter bridge is based on the principle of wheatstone bridge and it is used to find the resistance of an unknown conductor or to compare two unknown resistance. Ncert book class 12 physics pdf free download part 1 and 2. The unknown resistance s is connected in the gap e and a resistance box r box in gap f of the metre bridge. The general arrangement of wheatstone bridge circuit is shown in the.
The meter bridge is a device for measurement of resistance using the principle of wheatstone network. A meter bridge also called a slide wire bridge is an instrument that works on the principle of a wheatstone bridge. Meter bridge is based on the principle of wheatstone bridge. The below figure 12 is the diagram of a useful meter bridge instrument.
A meter bridge is an apparatus used to find the resistance of a coil. In a meter bridge experiment, the null point for the unknown resistance is measured. So we at eduskool learn from homeyoutube channel are soon going to upload the completely verified physics practical observation and various investigatory projects so that. Hello there i myself have gone through this trouble before as well as now. The experiment records and activities consist of 6 marks, the project has 3 marks and viva on the experiment consist of 5 marks.
Class 12 computer practicals class 12 chemistry practicals class 12 physics practicals here you go. Using the formula x, we can find out the unknown resistance. Physics investigatory project on wheatstone bridge. State the principal and working of a meter bridge physics. Metre bridge law of combination of resistors procedure. Jun 27, 2015 meter bridge is based on the principle of wheat stone bridge and it is used to find the resistance of an unknown conductor or to compare two unknown resistance. Now, the experiment is repeated with the other unknown resistance r2 in the right gap. The year of pluto new horizons documentary brings humanity closer to the edge of the solar system duration. Metre bridge, a wire about 1m long of material whose specific resistance is to be determined, a resistance box, a rheostat, galvanometer, a jockey, oneway key. Empirical study comparing physical labs, tablets and desktops. A wheatstone bridge is a kind of electrical circuit used in measuring an electrical resistance, which is unknown by. A meter bridge is an electric device used for measuring an unknown resistance.
Now, the resistance is put inside an enclosure maintained at a higher temperature. Potentiometer construction, working and applications elprocus. Two gaps are formed on it by using thick metal strips in order to make the wheat stones bridge. Part of made in india, design innovation workshop,2015 a fresh new experience in project. In the meter bridge experiment, balance point was observed at. How to find class 12 physics experiments with readings quora. Where r is the resistance from resistance box in the. The physics practicals for class 12 cbse is given here so that students can understand the experiments in a better way. To find the resistance of a given wire using meter bridge and hence determine the resistivity specific resistance of its material. Pdf investigatory projects physics class 12 cbse pdf. These potentiometers are used in huge quantities in the manufacture of. C expands global development through overseas projects.
Meter bridge or slide wire bridge self study point. Meter bridge determination of specific resistance experiment. To verify the laws of combination series of resistance. How to calculate unknown resistance using meter bridge. Your browser does not currently recognize any of the video formats available. Aim to find the resistance of a given wire using meter bridge and hence determine resistivity of its material. To find the resistance of the given wire using meter bridge and hence determine the specific resistance of its material. Physics practical class 12 all study guide at one place. The metre bridge is operates under wheatstones principle. Ab is a uniform wire 100 cm1m long, stretched in two segments of 50 cms.