We know that the wheatstone bridge is used to measure the unknown resistance connected in a circuit. Meter bridge is an instrument that is used to find the unknown resistance of a coil or any other material. Meter bridge determination of specific resistance experiment edunovus online smart practicals. The battery voltage is 5 v and its internal resistance negligible. Metre bridge it consists of one metre long constantan wire ac of uniform crosssectional ar ea mounted on a wooden board with a scale fig. Lab experiment for kelvin double bridge sign up to get notified when this product is back in stock measurements labfind the value of unknown resistance using a kelvin double bridge. Ab is a uniform wire 100 cm1m long, stretched in two segments of 50 cms.
This bridge works under the principle of wheatstone 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. Another advantage of the wheatstone bridge is that, because it uses a null measurement, vab 0, the galvanometer does not have to be calibrated. Click on the battery and the resistance box shown on the side bar menu to place them near to the metre bridge. The meter bridge is a device for measurement of resistance using the principle of wheatstone network.
It consists of four resistors of which two resistors are known resistors, one. It is bad practice to have a balance point near one end of the wire. Aim to find the resistance of a given wire using meter bridge and hence determine resistivity of its material apparatus. Notice that the computed rx does not depend on the voltage vo. Lab experiment for kelvin double bridge pantech solutions. Name of the apparatus quantity 1 lab trainer kit 1 2 multimeter 1 3 unknown inductor 1 theory. Finding the resistance of a given wire using meter bridge. Electric science free energy using magnet with light bulb at home 2019. A meter bridge slide wire bridge, a lecranche cell, a galvanometer, a resistor, a jockey, a one way key, a resistance wire, a screw gauge, a meter scale, a set of square, connecting wire, a piece of sand paper. Measurement of inductance by hays bridge apparatus used. Thick metal strips bent at right angles ar e used to pr ovide two gaps e and f to connect resistors forming a wheatstones fig.