International Library of Technology · Scranton, International Textbook Co. · leaf 265
rrent, the swinging coil and fixed coilare connected in series, so that when a current flows,the field set up by the fixed coil changes in unison withthe current in the swinging coil, thus producing a de-flection. The swinging coil tries to assume a positionparallel to the fixed coil, and the… … CURRENT APPARATUS. 2039 action, or torque, is proportional to the square of the cur-rent flowing through the instrument. After the swingingcoil has been deflected, the torsion head is turned until thepointer attached to the coil comes back to the zero-point,and the reading on the circular scale is…
Electrical engineering
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