Electrical Measurements | Name the different torques and their function in measuring instrument.

Different Torques in Measuring Instruments: 

1) Deflecting torque

2) Controlling / Restraining torque. 3) Damping torque.

Function of Deflecting Torque: 

To produce deflection proportional to the quantity being measured. 

Function of Controlling Torque: 

1) To restrict the motion of pointer / spindle and stop the pointer at the relevant position to get correct reading. 

2) To bring back pointer to zero position when the quantity under measurement is removed. 

Function of Damping Torque:

1) To stop pointer / spindle at the final steady state position.

2) Bring the pointer to stand still quickly.

3) Minimizes the oscillations about final reading position.