Callender and Griffith s Bridge Dial Type
Specification
This
instrument is an improvement over the Student's Potentiometer. The 50
cms long side wire of 1 ohm resistance is calibrated into 100 parts to
facilitrate calculations. 14 coils are arranged in series in dial from
each being of 1 ohm resistance. 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 standardising it through a Galvanometer
connected to G.C. The value of Potential Gradient can be found
standardising it against a standard cell, and thus it can be made direct
reading. Imported Testing Bridge.