Why are voltmeters and resistors connected in parallel in Ohm's Law?

Never mind Ohm's Law. A voltmeter measures the difference in electrical potential between two points. So if you want to measure the difference in electrical potential between two points, you touch one probe of the meter to each point, and somehow the internal guts of the meter are able to sense the difference in electrical potential between the two points.
If the two points have non-reactive impedance (a resistance) between them, then the difference in electrical potential between the two points, as indicated by the meter, will be close to (resistance between the two points) x (current flowing between them).

Answered by AL2006 | 2024-06-10

Voltmeters are connected in parallel to accurately measure voltage differences without significantly affecting the circuit. They have very high internal resistance, which minimizes current flow through the meter itself. This setup allows them to measure the potential difference directly across the component of interest using Ohm's Law.
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Answered by AL2006 | 2024-12-24