In a portable instrument, the controlling torque is provided by_____________?

Related Mcqs:

1. In a meggar controlling torque is provided by______________?

   A. spring B. gravity C. coil D. eddy current...

2. In an energy meter braking torque is produced to________________?

   A. safe guard it against creep B. brake the instrument C. bring energy meter to stand still D. maintain steady speed and equal to driving torque...

3. Which of the following essential features is possessed by an indicating instrument?

   A. Deflecting device B. Controlling device C. Damping device D. All of the above...

4. A moving-coil permanent-magnet instrument can be used as ____________by using a low resistance shunt?

   A. ammeter B. voltmeter C. flux-meter D. ballistic galvanometer...

5. A moving-coil permanent-magnet instrument can be used as flux-meter_____________?

   A. by using a low resistance shunt B. by using a high series resistance C. by eliminating the control springs D. by making control springs of large moment of inertia...

6. The pointer of an indicating instrument should be______________?

   A. very light B. very heavy C. either A. or B. D. neither A. nor B....

7. The gravity controlled instrument has crowded scale because current is proportional to________________?

   A. balancing weight B. deflection angle C. sine of deflection angle...

8. If an instrument has cramped scale for larger values, then it follows________________?

   A. square law B. logarithmic law C. uniform law D. none of the above...

9. An instrument transformer is used to extend the range of______________?

   A. induction instrument B. electrostatic instrument C. moving coil instrument D. any of the above...

10. The ratio of maximum displacement deviation to full scale deviation of the instrument is called_______________?

    A. static sensitivity B. dynamic deviation C. linearity D. precision or accuracy...