What is the main source of error in a null detector?

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What is the main source of error in a null detector?

1. lower current detection ability

2.insufficient sensitivity of the null detector

3.wiring resistance

4.power dissipation

Posted Date:-2022-05-02 06:37:31

More MCQS Questions and answers

  1. A Wheatstone bridge may not give accurate readings if _______
  2. How can a Wheatstone bridge be used for the measurement of physical parameters?
  3. How is the measurement accuracy in a bridge circuit?
  4. One of the simplest applications of a Wheatstone bridge is _____
  5. Sensitivity is expressed in ____
  6. The arms consisting of the resistances R1 and R2 are called _____
  7. A galvanometer is used as a _____
  8. Accuracy of bridge circuit depends on _____
  9. Amount of deflection of the galvanometer depends on ______
  10. Balance condition can be obtained by _______
  11. By using the variations on a Wheatstone bridge we can _______
  12. Commonly used D.C. bridges are ____
  13. Cost of maintenance of Wheatstone bridge is ______
  14. Effect of high dc on Wheatstone bridge.
  15. Heating effect in the Wheatstone bridge can be avoided by ______
  16. How is thermal emf generated?
  17. In control applications, one arm of the bridge circuit contains a _____
  18. Resistance R4 is known as _______
  19. Sensitivity is defined as _____
  20. Telephone companies make use of the Wheatstone bridge for ______
  21. The arm consisting of the standard known resistance R3 is known as _______
  22. The balance condition of a Wheatstone bridge depends on the _____
  23. The bridge circuit can be used in _______
  24. The main error when measuring low resistances is _____
  25. The opposite two ends of a Wheatstone bridge consist of ____
  26. The simplest type of bridge used for the measurement of medium resistances is known as ______
  27. The source of error in a Wheatstone bridge is due to _____
  28. The types of faults in a telephone line are ________
  29. The voltage sensitivity of a galvanometer is given by ______
  30. The Wheatstone bridge is used for the measurement of ______
  31. Thermal compensation can be provided in a Wheatstone bridge by ____
  32. Thermal emf can be prevented by _______
  33. Unit of voltage sensitivity is ______
  34. What are the physical parameters that are to be controlled when a bridge is used in control applications?
  35. What happens to the balance condition, if the source and detector are interchanged?
  36. What is connected between the two ends of a Wheatstone bridge?
  37. What is the effect of galvanometer on measurement of high resistance?
  38. What is the effect of heat on the resistances in a Wheatstone bridge?
  39. What is the effect of lead wires on the Wheatstone bridge?
  40. What is the effect of the increase in temperature on the resistance elements?
  41. What is the main source of error in a null detector?
  42. What is the relation between the sensitivity and deflection for a galvanometer?
  43. Wheatstone bridge can’t be used for measurement of _____
  44. Wheatstone bridge consists of ______
  45. Wheatstone bridge is a ________
  46. Wheatstone bridge is used to measure resistance in the range of _____
  47. Wheatstone bridge is used to measure the d.c. resistance of various types of wires for _____
  48. Wheatstone bridge works on the principle of _____
  49. When current passes through the resistances in the Wheatstone bridge what happens?
  50. When the bridge is balanced, what is the current flowing through the galvanometer?
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