Relation between restoring torque in spring controlled indicating instrument & angle of deflection of moving system

Q.  The restoring torque in a spring controlled indicating instrument is
- Published on 14 Sep 15

a. Directly proportional to the angle of deflection of moving system
b. Directly proportional to the sine of angle of deflection of moving system
c. Inversely proportional to the angle of deflection of moving system
d. Directly proportional to the square of the angle of deflection of moving system

ANSWER: Directly proportional to the angle of deflection of moving system

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