Q7.3Multiple choice
When a voltage measuring device is connected to AC mains, the meter shows the steady input voltage of 220V. This means
- (a)input voltage cannot be AC voltage, but a DC voltage.
- (b)maximum input voltage is 220V.
- (c)the meter reads not v but <v2> and is calibrated to read < v2 > .
- (d)the pointer of the meter is stuck by some mechanical defect.