Physics · Alternating Current Measuring Instruments
When a voltage measuring device is connected to AC mains, the meter shows a steady input voltage of 220 V. This means:
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- 1the input voltage cannot be AC voltage, but is a DC voltage.
- 2the maximum peak input voltage is 220 V.
- 3the meter reads the mean square voltage and is calibrated to display the RMS value √ .✓
- 4the pointer of the meter is stuck due to some mechanical defect.
Correct answer
the meter reads the mean square voltage and is calibrated to display the RMS value √ .
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