Is Voltage Across Always a Magnitude?

[pyroknife]

"Voltage across" a magnitude?

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

 

[rock.freak667]

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.

 

[rude man]

There is polarity associated with that voltage.

 

[phinds]

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

It is a signed magnitude.