# Phasor representation question

In summary, phasor representation is a mathematical tool used in electrical engineering and physics to represent complex numbers in a polar form. It is useful for analyzing AC circuits and can be converted to and from time domain representations using Fourier transforms. It can also be used for periodic non-sinusoidal signals.
Guys,
Quick one, When you do phasors for AC voltages and current... is it theVrms and Irms or can it be Vmax and Imax..? I mean the magnitude of them...I am bit confused

thanks guys, got the answer it does not matter of which one you take the phasor of as long as you don't mix them up...

In phasor representation, the magnitude of the voltage and current can be represented in either Vrms and Irms or Vmax and Imax. It ultimately depends on the specific application and what values are being measured. Vrms and Irms represent the root mean square values, which are the effective values of the voltage and current over time. Vmax and Imax represent the maximum values of the voltage and current, which occur at the peak of the wave. Both representations are valid and can be used depending on the context of the problem. It is important to understand the difference between these values and use the appropriate one for the given situation.

## 1. What is a phasor representation?

A phasor representation is a mathematical tool used in electrical engineering and physics to represent complex numbers in a polar form. It is often used to analyze the magnitude and phase of an alternating current or voltage signal.

## 2. How is a phasor representation different from a time domain representation?

A phasor representation uses complex numbers to represent a signal, while a time domain representation uses real numbers. Also, a phasor representation is a frequency domain representation, while a time domain representation is a representation in the time domain.

## 3. Why is phasor representation useful in electrical engineering?

Phasor representation is useful in electrical engineering because it simplifies the analysis of AC circuits, making it easier to calculate voltage, current, and power. It also allows for the use of complex arithmetic, which is more efficient for solving certain problems compared to using trigonometric functions.

## 4. How do you convert between phasor and time domain representations?

To convert from a phasor representation to a time domain representation, you can use the inverse Fourier transform. This will give you the real part of the complex number, which represents the amplitude of the signal. To convert from a time domain representation to a phasor representation, you can use the Fourier transform, which will give you the complex number representation of the signal.

## 5. Can phasor representation be used for non-sinusoidal signals?

Yes, phasor representation can be used for non-sinusoidal signals as long as they are periodic. In this case, the phasor representation will give you the average magnitude and phase of the signal over one period. However, it is not suitable for analyzing non-periodic signals.

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