Callender and Griffith’s Bridge Callender and Griffith’s Bridge – Physics Laboratory Equipment Three in one – Carry’s Foster Bridge, Potentiometer & Callender & Griffith’s Bridge. It is an improvement over the potentiometer. The 50 cm long slide wire if 1 ohms resistance is calibrated into 100 equal parts. 14 coils are arranged in series in dial form each being of 1 ohms resistance. Terminals arranged for appropriate working of different instruments. jockey sliding on brass rod, accuracy of adjustment 05% Accuracy of adjustment 0.1% A 2 volts accumulator through a Rheostat and Key should be connected to terminal P1 to P2 and the P.D. to be balanced on it. The value of Potential Gradient can be found by standardizing it through a Galvanometer connected to G.C. The value of Potential Gradient can be found standardizing it against a standard cell, and thus it can be made direct reading. Imported Testing Bridge.
