Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > A phasor1. may be a scalar or a vector2. is a...
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A phasor
1. may be a scalar or a vector
2. is a time-dependent quantity
3. is a complex quantity
Which of the above statements are correct?
- a)1, 2 and 3
- b)1 and 2 only
- c)1 and 3 only
- d)2 and 3 only
Correct answer is option 'D'. Can you explain this answer?
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Most Upvoted Answer
A phasor1. may be a scalar or a vector2. is a time-dependent quantity3...
The correct answer is option D: 2 and 3 only.
1. A phasor may be a scalar or a vector:
A phasor is a mathematical representation used to describe the magnitude and phase relationship of a time-varying quantity, such as an electrical voltage or current. It can be represented as a scalar or a vector, depending on the specific application. In the case of a scalar phasor, only the magnitude is considered, while a vector phasor includes both magnitude and direction.
2. A phasor is a time-dependent quantity:
A phasor represents a sinusoidal waveform that varies with time. It is typically used to simplify the analysis of complex electrical circuits or systems operating at a single frequency. By converting the time-dependent waveform into a phasor, the analysis can be performed in the frequency domain, which is often more convenient and efficient.
3. A phasor is a complex quantity:
A phasor is commonly represented using complex numbers. The real part of the complex number represents the magnitude of the phasor, while the imaginary part represents the phase angle. The use of complex numbers allows for a concise representation of both magnitude and phase, simplifying the mathematical calculations involved in phasor analysis.
Therefore, statements 2 and 3 are correct, while statement 1 is incorrect. Phasors can be either scalar or vector quantities depending on the specific application.
1. A phasor may be a scalar or a vector:
A phasor is a mathematical representation used to describe the magnitude and phase relationship of a time-varying quantity, such as an electrical voltage or current. It can be represented as a scalar or a vector, depending on the specific application. In the case of a scalar phasor, only the magnitude is considered, while a vector phasor includes both magnitude and direction.
2. A phasor is a time-dependent quantity:
A phasor represents a sinusoidal waveform that varies with time. It is typically used to simplify the analysis of complex electrical circuits or systems operating at a single frequency. By converting the time-dependent waveform into a phasor, the analysis can be performed in the frequency domain, which is often more convenient and efficient.
3. A phasor is a complex quantity:
A phasor is commonly represented using complex numbers. The real part of the complex number represents the magnitude of the phasor, while the imaginary part represents the phase angle. The use of complex numbers allows for a concise representation of both magnitude and phase, simplifying the mathematical calculations involved in phasor analysis.
Therefore, statements 2 and 3 are correct, while statement 1 is incorrect. Phasors can be either scalar or vector quantities depending on the specific application.
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Community Answer
A phasor1. may be a scalar or a vector2. is a time-dependent quantity3...
Phasor diagrams are a graphical way of representing the magnitude and directional relationship between two or more alternating quantities.
Basically, a rotating vector called a Phasor is a scaled line whose length represents an AC quantity that has both magnitude and direction which is frozen at some point in time.
Characteristics:
- It is a vector quantity
- It is a complex quantity
- It is a time dependent quantity
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A phasor1. may be a scalar or a vector2. is a time-dependent quantity3. is a complex quantityWhich of the above statements are correct?a)1, 2 and 3b)1 and 2 onlyc)1 and 3 onlyd)2 and 3 onlyCorrect answer is option 'D'. Can you explain this answer?
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