To study the vi characteristics of an incandescent lamp. Electric science free energy using magnet with light bulb at home 2019. The galvanometer has a current sensitivity of 10 mma and an internal resistance of 100 calculate the deflection of the galvanometer caused by the 5. Meter bridge is an instrument that is used to find the unknown resistance of a coil or any other material. Notice that the computed rx does not depend on the voltage vo. The meter bridge is a device for measurement of resistance using the principle of wheatstone network. Lab experiment for kelvin double bridge pantech solutions. It consists of four resistors of which two resistors are known resistors, one. 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. Measurement of inductance by hays bridge apparatus used. Click on the battery and the resistance box shown on the side bar menu to place them near to the metre bridge. It is bad practice to have a balance point near one end of the wire. The two ends of the wire are attached to ter minals a and c.
To verify the laws of combination of resistances in series using a meter bridge. 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. Finding the resistance of a given wire using meter bridge. This bridge works under the principle of wheatstone bridge.
Aim to find the resistance of a given wire using meter bridge and hence determine resistivity of its material apparatus. Another advantage of the wheatstone bridge is that, because it uses a null measurement, vab 0, the galvanometer does not have to be calibrated. Ab is a uniform wire 100 cm1m long, stretched in two segments of 50 cms. We know that the wheatstone bridge is used to measure the unknown resistance connected in a circuit. 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. To find the resistance of the given wire using meter bridge and hence determine the specific resistance of its material. Drag one of the wires to the right gap of the metre bridge. The hays bridge differs from maxwells bridge by having resistor r1 in series with standard capacitor c1 instead of in parallel.