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Which of the following can be used to measure rms, peak and average values of an a.c. voltage?
I. Hot wire instrument.
II. Rectifier instrument
III. Megger
IV. CRO.
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- I and II only
- II and III only
- III only
- IV only
- I and II only
Correct Option: D
Since Hot wire and Rectifier instruments are used. For measuring rms values only.
Therefore alternative (d) is the correct choice.
