Partial preview of the text
Download Important topic of physics and more Study notes Physics in PDF only on Docsity!
EXPERIMENT 2 AIM To find resistance 1 of a given wire resistance) of its m ‘ using metre bridge ence determine the resistivity ifi stedar i lige and hence determine the resistivity (specific APPARATUS A metre bridge (slid jockey. a one way ey, lide wire bridge), a Leclanche cell (Battery eliminator), a galvanometer, a resistance box, a a resist: i sand paper. ‘ance wire, a screw gauge, a metre scale, a set, square, connecting wires and a piece of THEORY @) The unknown resistance X is given by x= 00D where R i * vere is fnown resistance placed in the left gap and unknown resistance X in the right gap of metre bridge. / cm ength of metre bridge wire from zero end upto balance point. (ii) Specific resistance (p) of the material of the given wire is given by XnD? p= 4L where, L is the length and D is the diameter of the given wire. CIRCUIT DIAGRAM Known resistance Unknown resistance Cc Leclanche cell (Battery eliminator) Fig. Circuit diagram—Metre bridge. PROCEDURE For Resistance 1, Arrange the apparatus as shown in the diagram. 2. Connect the resistance wire whose resistance is to be determined t in the right gap between C and B. Take care that no part of the wire forms a loop. 3. Connect resistance box of low range in the left hand gap between A and B. 4. Make all the other connections as shown in the circuit diagram. 17 
