Is Voltage Across Always a Magnitude?

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Homework Help Overview

The discussion revolves around the concept of voltage in electrical circuits, specifically addressing whether "voltage across" a component, such as a resistor, is always considered a magnitude. The subject area includes both direct current (DC) and alternating current (AC) circuit analysis.

Discussion Character

  • Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants explore the nature of voltage in different circuit types, questioning whether it is strictly a magnitude or if it includes additional characteristics such as polarity and phase angle.

Discussion Status

Some participants have offered insights regarding the scalar nature of voltage in DC circuits and the complexity introduced in AC circuits. There is an ongoing examination of the implications of polarity and signed magnitude in the context of voltage measurements.

Contextual Notes

Participants are discussing the definitions and characteristics of voltage without reaching a definitive conclusion, highlighting the need for clarity on how voltage is represented in various scenarios.

pyroknife
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"Voltage across" a magnitude?

If a problem says to find the "voltage across" a resistor, is that always a magnitude?
 
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I may be wrong here but from what I remember from school,

in DC circuits, voltage is scalar.

in AC circuits, the voltage will have an associated phase angle with it.
 


There is polarity associated with that voltage.
 


pyroknife said:
If a problem says to find the "voltage across" a resistor, is that always a magnitude?

It is a signed magnitude.
 

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