Electronic measurements and instrumentation miscellaneous

Electronic measurements and instrumentation miscellaneous

Easy Questions
Moderate Questions
Difficult Questions

Electronic Measurements And Instrumentation

Electronic measurements and instrumentation miscellaneous
  1. Two-wattmeter method is employed to measure power in 3-phase balanced system with the current coil connected in the A and C lines. The phase sequence is ABC. If the wattmeter with its current coil in A-phase line reads zero, then the power factor of the 3-phase load will be:








  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: C

    NA

  1. In the statement “the wattmeter commonly used for power measurement at commercial frequencies is of the X type This meter consists of two coil systems, the fixed system being the Y coil and moving system being Z coil”. X, Y and Z stand respectively for:








  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: B

    NA

  1. Which bridge is used for measuring audio and H.F. oscillations?








  1. View Hint View Answer Discuss in Forum

    Wein bridge is used for measuring audio and High frequency (H.F.) oscillations.

    Correct Option: A

    Wein bridge is used for measuring audio and High frequency (H.F.) oscillations.

  1. Two voltmeters one with a full scale reading of 100 V and another with a full scale reading of 200 V, are connected in series across a 100 V supply. The internal resistance of both meters is the same. What are the readings?








  1. View Hint View Answer Discuss in Forum

    The given problem can be better understand by the figure given below:
    Since both the voltmeter have same internal resistance and the voltmeter are connected in series across a 100V supply. Hence the reading of both the voltmeters will be same i.e. 50V.


    Correct Option: D

    The given problem can be better understand by the figure given below:
    Since both the voltmeter have same internal resistance and the voltmeter are connected in series across a 100V supply. Hence the reading of both the voltmeters will be same i.e. 50V.


  1. The deflection of hot wire instruments depends on:








  1. View Hint View Answer Discuss in Forum

    The deflection of not wire instruments depends on r.m.s. value of alternating current.

    Correct Option: C

    The deflection of not wire instruments depends on r.m.s. value of alternating current.