Is Voltage Across Always a Magnitude?

In summary, voltage is the potential difference between two points in an electric circuit, measured in volts. Magnitude refers to the size or amount of something, and in the context of voltage, it represents the numerical value of the potential difference. Voltage across a magnitude is typically measured using a voltmeter and is affected by the resistance and current in the circuit. It is important because it determines the energy transfer and is crucial for the proper functioning of electronic devices.
  • #1
pyroknife
613
4
"Voltage across" a magnitude?

If a problem says to find the "voltage across" a resistor, is that always a magnitude?
 
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  • #2


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.
 
  • #3


There is polarity associated with that voltage.
 
  • #4


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

It is a signed magnitude.
 
  • #5


The term "voltage across" typically refers to the difference in electric potential between two points, often measured in volts. In the context of a resistor, it would refer to the potential difference between the two ends of the resistor. This can indeed be considered a magnitude, as it represents the numerical value of the voltage difference. However, it is important to note that voltage is a vector quantity, meaning it has both magnitude and direction. So while the voltage across a resistor may be described as a magnitude, it is also important to consider the direction of the voltage difference.
 

FAQ: Is Voltage Across Always a Magnitude?

What is voltage?

Voltage, also known as electromotive force, is the potential difference between two points in an electric circuit. It is measured in volts and represents the amount of energy required to move an electric charge from one point to another.

What is magnitude?

Magnitude refers to the size or amount of something. In the context of voltage, it is the numerical value of the potential difference between two points in an electric circuit.

How is voltage across a magnitude measured?

Voltage across a magnitude is typically measured using a voltmeter, which is a device that measures the potential difference between two points in an electric circuit. The voltmeter is connected in parallel with the component or circuit being measured.

What factors affect voltage across a magnitude?

The main factors that affect voltage across a magnitude are the resistance of the circuit and the amount of current flowing through it. The higher the resistance, the higher the voltage drop across the circuit. Similarly, the higher the current, the higher the voltage drop.

Why is voltage across a magnitude important?

Voltage across a magnitude is important because it determines the amount of energy that can be transferred in an electric circuit. It also plays a critical role in the functioning of electronic devices, as different components require different voltage levels to operate properly.

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