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

Related Mcqs:

1. Which of the following devices may be used for extending the range of instruments ?

   A. Shunts B. Multipliers C. Current transformers D. Potential transformers E. All of the above...

2. In a 3-phase power measurement by two wattmeter method, both the watt meters had identical readings. The power factor of the load was___________?

   A. unity B. 0.8 lagging C. 0.8 leading D. zero...

3. For measurement of mutual inductance we can use________________?

   A. Anderson bridge B. Maxwell’s bridge C. Heaviside bridge D. Any of the above...

4. For measurement of inductance having high value, we should use______________?

   A. Maxwell’s bridge B. Maxwell Wein bridge C. Hay’s bridge D. Any of the above...

5. In a 3-phase power measurement by two wattmeter method the reading of one of the wattmeter was zero. The power factor of the load must be_______________?

   A. unity B. 0.5 C. 0.3 D. zero...

6. Commonly used instruments in power system measurement are_______________?

   A. induction B. moving coil or iron C. rectifier D. electrostatic...

7. The operating voltage of a meggar is about_______________?

   A. 6 V B. 12 V C. 40 V D. 100 V...

8. To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken_______________?

   A. from a source which is not the same as the unknown voltage B. from a battery C. from the same source as the unknown voltage D. any of the above...

9. If the current in a capacitor leads the voltage by 80°, the loss angle of the capacitor is_________________?

   A. 10° B. 80° C. 120° D. 170°...

10. For measurements on high voltage capacitors, the suitable bridge is_______________?

    A. Wein bridge B. Modified De Santy’s bridge C. Schering bridge D. Any of the above E. None of the above...