What will the phasor diagram of this LCR circuit looks like?

In summary, the current of capacitor and inductor must be parallel but pointing in opposite directions due to the fact that they are connected in parallel and have the same voltage. However, the direction of the current of the resistor is dependent on the frequency as Z is a complex number.
  • #1
Cedric Chia
22
2
Homework Statement
What will the phasor diagram of this LCR circuit looks like?
Relevant Equations
V=IZ
I know the current of capacitor and inductor must be parallel but pointing in opposite direction due to the fact they are connected in parallel thus having same voltage (please see attached screenshots). The current of resistor will simply be the sum of these two vectors, but what about its direction? Should it be pointing the same direction as the current of capacitor or inductor?
 

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  • #2
Hello CC,

Are you aware of the fact that Z is a complex number and that it is frequency dependent ?
Your statement
Cedric Chia said:
I know the current of capacitor and inductor must be parallel but pointing in opposite direction due to the fact they are connected in parallel thus having same voltage
does not make much sense to me, nor does
Cedric Chia said:
The current of resistor will simply be the sum of these two vectors
since I always learned that current is a scalar -- but perhaps you mean something else ?
 

What is a phasor diagram?

A phasor diagram is a graphical representation that shows the phase and magnitude relationship between different components in an alternating current (AC) circuit.

What are the components of an LCR circuit?

An LCR circuit consists of three components: an inductor (L), a capacitor (C), and a resistor (R). These components are connected in series or parallel and have a unique effect on the flow of AC current through the circuit.

How is the phasor diagram of an LCR circuit drawn?

The phasor diagram of an LCR circuit is drawn by representing the three components (inductor, capacitor, and resistor) as vectors with magnitude and phase angles. The direction of the vectors depends on the type of circuit (series or parallel) and the relationship between the components.

What does the phasor diagram tell us about an LCR circuit?

The phasor diagram provides information about the phase and magnitude relationship between the components in an LCR circuit. It helps in understanding the behavior of the circuit, including the voltage and current values at different frequencies.

What are some applications of phasor diagrams in LCR circuits?

Phasor diagrams are commonly used in electrical engineering to analyze and design LCR circuits. They are also helpful in troubleshooting issues with AC circuits and predicting the behavior of different components under varying conditions.

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