Damping of the Ballistic galvanometer is made small to_______________?

Related Mcqs:

1. Which of the following properties a damping oil must possess ?

   A. Must be a good insulator
   B. Should be non-evaporating
   C. Should not have corrosive action upon the metal of the vane
   D. The viscosity of the oil should not change with the temperature
   E. All of the above

2. In majority of instruments damping is provided by______________?

   A. fluid friction
   B. spring
   C. eddy currents
   D. all of the above

3. The disc of an instrument using eddy current damping should be of________________?

   A. conducting and magnetic material
   B. non-conducting and magnetic material
   C. conducting and non-magnetic material
   D. none of the above

4. A sensitive galvanometer produces large deflection for a_______________?

   A. small value of current
   B. large value of current
   C. large value of power
   D. large value of voltage
   E. none of the above

5. Most sensitive galvanometer is_____________?

   A. elastic galvanometer
   B. vibration galvanometer
   C. Duddlb galvanometer
   D. spot ballistic galvanometer

6. Which of the following are integrating instruments ?

   A. Ammeters
   B. Voltmeters
   C. Wattmeters
   D. Ampere-hour and watt-hour meters

7. For handling greater currents induction wattmeters are used in conjunction with______________?

   A. potential transformers
   B. current transformers
   C. power transformers
   D. either of the above
   E. none of the above

8. Which of the following devices should be used for accurate measurement of low D.C. voltage ?

   A. Small range moving coil voltmeter
   B. D.C. potentiometer
   C. Small range thermocouple voltmeter
   D. None of the above

9. The two pressure coils of a single phase power factor meter have_________________?

   A. the same dimensions and the same number of turns
   B. the same dimension but different number of turns
   C. the same number of turns but different dimensions
   D. none of the above

10. The rectifier instrument is not free from_______________?

    A. temperature error
    B. wave shape error
    C. frequency error
    D. all of the above