Assertion: voltmeter's reading | /r/HasProperty | inaccurate
Facets:
Source sentences:
text: When used for measuring voltage, the input impedance of the multimeter must be very high compared to the impedance of the circuit being measured; otherwise circuit operation may be changed, and the reading will also be inaccurate.
text: This particularly affects low power (e.g. under 10 watts), as used in standby; readings may be so inaccurate as to be useless (although they do confirm that standby power is low, rather than high).
text: Why? if the resistance is lower, it will load the circuit and change the readings, and therefore the readings will be inaccurate.
text: Why? if the resistance is high, it will change the circuit and possibly change the readings, and therefore the readings will be inaccurate.