Finding voltage phasor resistance * current phasor

In summary, a voltage phasor is a complex number representation of a voltage signal in the frequency domain, while a current phasor is a complex number representation of a current signal in the frequency domain. To find the voltage phasor in a circuit, you must first determine the voltage across the component or circuit of interest and then convert it to its complex number representation. Similarly, to find the current phasor, you must determine the current flowing through the component or circuit of interest and convert it to its complex number representation. According to Ohm's Law in the frequency domain, the voltage phasor is equal to the product of the current phasor and the resistance, regardless of whether the circuit is AC or DC.
  • #1
pokie_panda
37
0

Homework Statement



I=75<120 deg.
R= 4k
find phasor voltage

does the 4,000 multiply the 75 only so you get

300000<120

or does it multiply 4,000 both values including the angle ?
 
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  • #2
pokie_panda said:

Homework Statement



I=75<120 deg.
R= 4k
find phasor voltage

does the 4,000 multiply the 75 only so you get

300000<120

or does it multiply 4,000 both values including the angle ?

Multiplying a complex number or phasor by a real constant changes only its magnitude. The angle remains the same.
 
  • #3
Thanks
 

1. What is a voltage phasor?

A voltage phasor is a complex number representation of a voltage signal in the frequency domain. It includes both the magnitude and phase of the voltage signal.

2. What is a current phasor?

A current phasor is a complex number representation of a current signal in the frequency domain. It includes both the magnitude and phase of the current signal.

3. How do you find the voltage phasor in a circuit?

To find the voltage phasor in a circuit, you need to first determine the voltage across the component or circuit of interest and then convert it to its complex number representation by considering the magnitude and phase of the voltage signal.

4. How do you find the current phasor in a circuit?

To find the current phasor in a circuit, you need to first determine the current flowing through the component or circuit of interest and then convert it to its complex number representation by considering the magnitude and phase of the current signal.

5. What is the relationship between voltage phasor, current phasor, and resistance?

According to Ohm's Law in the frequency domain, the voltage phasor is equal to the product of the current phasor and the resistance. This relationship holds true for both AC and DC circuits.

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