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Q. No.When a voltage measuring device is connected to AC mains, the meter shows the steady input voltage of \(220~\text{V}\). This means:
| 1. | input voltage cannot be AC voltage, but a DC voltage |
| 2. | maximum input voltage is \(220~\text{V}\) |
| 3. | the meter reads not \(v\) but \(<v^2>\) and is calibrated to read \(\sqrt{<v^2>}\) |
| 4. | the pointer of the meter is stuck by some mechanical defect |
Subtopic: Â RMS & Average Values |
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