Measurement

Measurement 

1. Sensitivity of a voltmeter is given as
2. Systematic errors are
3. Standard deviation is given as
4. The switch board instruments are mounted in
5. Operating torque in an indicating instrument are
6. The force responsible for reduction of oscillations of the pointer in an ammeter is
7. In an indicating instrument, the damping is usually adjusted
8. The controlling torque in gravity controlled meter is proportional to
9. For a sensitive galvanometer, the type of support used is
10. The internal resistance of the milli ammeter must be low for
11. The material that has the least thermo electric power against copper
12. A moving iron ammeter coil has few turns of  thick wire in order to have
13. In MI Instruments, the deflection is proportional to
14. The deflecting torque of moving iron instruments is
15. In PMMC instrument , the torque/weight ratio is
16. When PMMC instrument is connected to ac voltage ,the instrument will indicate
17. An advantage of a PMMC instrument is that it has
18. The term artificial aging in instrument is associated with
19. In PMMC instruments the scale is
20. The PMMC meter can measure
21. The PMMC instrument gives uniform scale due to
22. Electro static instrument is mainly used for measurement of
23. The instrument  is used to measure dc voltage is
24. Vibrating reeds are employed in
25. Creeping is the phenomenoa which occurs in

26.  An ohmmeter is basically __________.

27.  Which instrument has the lowest resistance ____________.

28.  Meggar is an instrument used for measurement of _________.

29.  Maxwell bridge is used for measurement of ______________ .

30.  Maxwell Bridge is very convenient and useful bridge for determination of inductance of a coil having ________.

31.  Hay’s Bridge is suitable for the measurement of ___________.

32.  Dielectric loss in an imperfect capacitor is given as _________.

33.  Electro static instruments are mainly used for measurement of ________.

34.  Clamp on ammeter is used for measurement of ____________.

35.  Electrolytic meter is basically an _____________.

36.  Induction watt meters can be used to measure __________.

37.  Integrating meters are used for the measurement of ___________.

38.  Shunts are generally made of __________.

39.  A hair spring attached to the moving system is used to produce ___________.

40.  Most suitable material for use as spring material for most of the applications _________.

41.  Swamping resistance is used to compensate error due to ________.

42.  Preferred material for permanent magnet is ______________.

43.  Voltmeter should be of very high resistance so that ___________.

44.  Air friction damping is used in the instrument which is _____.

45.  Which of the following is absolute instrument?

46.  The Deflecting torque of a moving iron instrument is proportional to ______.

47.  In Induction type instruments, angle between two fluxes should be ____.

48.  W1 and W2 are the readings of two wattmeters used to measure power of a 3- phase balanced load.The reactive power drawn by the load is ______.

49.  The number of turns on the primary of current transformer is usually_______.

50.  A current transformer has a phase error of +3degree.The phase angle between the primary and secondary currents is _____.

Measurement key

1. 1. ohm/volt and reciprocal of full scale deflection current.
2. 2. instrumental and environmental errors.
3. 3. √∑d²/n-1.
4. 4.vertical position.
5. 5.deflecting,controlling and damping.
6. 6.Damping force.
7. 7. to the value slightly below critical value.
8. 8. sinө.
9. 9. suspension.
10. 10. minimum effect on the current in the circuit.
11. 11. manganin.
12. 12. low resistance and large current carrying capacity.
13. 13.dL/dө.
14. 14. i² dL/2dө.
15. 15. high.
16. 16.zero.
17. 17. high ratio ( torque /weight).
18. 18. Permanent magnets.
19. 19. uniformly divided.
20. 20.only dc quantities.
21. 21. spring control and deflecting torque is proportional to instrument current.
22. 22. high voltages.
23. 23. moving coil meter.
24. 24.frequency meter.
25. 25. energy meter.
26. 26. ammeter
27. 27. ammeter
28. 28. insulation resistance
29. 29. inductance
30. 30. low Q-factor
31. 31. inductances with Q>10
32. 32. VI tanδ
33. 33. voltmeter
34. 34. large alternating currents
35. 35. dc ampere hour meter
36. 36.ac power
37. 37.energy
38. 38.manganin
39. 39.controlling torque
40. 40.phosphor bronze
41. 41.temperature variations
42. 42.alnico
43. 43.it may draw current minimum possible
44. 44. moving iron
45. 45.tangent galvanometer
46. 46.i²
47. 47.90
48. 48.√3(w1+w2)
49. 49.1 to 5
50. 50.177