Important Measuring Instruments Multiple Choice Questions and Answers

46. Which of the following instruments can be made using magnetic effect

   A.Wattmeters

   B.Energy meters

   C.Voltmeters

   D.All of the above

47. In instruments the term 'artificial aging' is associated with

   A.Permanent magnets

   B.Damping

   C.Spring

   D.Controlling torque

48. Which of the following instruments can not be used for the measurement of A.C. as well as D.C. quantities

   A.Electrostatic instruments

   B.Induction type instruments

   C.Moving iron instruments

   D.Hot wire instruments

49. ........... instrument is free from hysteresis and eddy current errors

   A.Electrostatic

   B.Moving iron

   C.Moving coil-permanent magnet type

   D.Moving coil dynamometer type

50. ............ instrument will draw least current from the circuit in which it is incorporated

   A.Hot wire

   B.Rectifier

   C.Electrostatic

   D.Thermocouple

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