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Which of the following statements are FALSE? Wattmeters are used to measure rea...

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Which of the following statements are FALSE?

  1. Wattmeters are used to measure reactive power.
  2. Wattmeters have a current coil and a voltage coil.
  3. The wattmeter voltage coil behaves similarly to an ammeter and the current coil similar to a voltmeter.
  4. The voltage coil must be connected across the supply terminals and and current coil must be connected in series with the load.
  5. Low power factor wattmeters are used to accurately measure the power to loads with lower power factors e.g. inductive loads. 
  6. Unity power factor wattmeters are used to measure capacitive loads.
  7. The top image shows a unity power pf wattmetter and the bottom image shows a low pf wattmeter.
  8. Two wattmeter method is a method utilising two wattmeters that is used to measure three phase power such that 
  9. Two wattmeter method CANNOT be used when the neutral of a wye/star connected load or the phases of a delta connected load are inaccessible.

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