- #1

- 77

- 0

Find impedance.

Is it possible to calculate it? Am I missing something or I would need Xc or I to do that? Thank you for a hint.

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- Thread starter greg997
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- #1

- 77

- 0

Find impedance.

Is it possible to calculate it? Am I missing something or I would need Xc or I to do that? Thank you for a hint.

- #2

gneill

Mentor

- 20,945

- 2,886

Find impedance.

Is it possible to calculate it? Am I missing something or I would need Xc or I to do that? Thank you for a hint.

You would need to know Xc or something else about the behavior of the circuit, such as the current, or whether the circuit was being driven at its natural frequency (resonance).

- #3

- 1,506

- 18

- #4

- 77

- 0

Becouse Vs=sqrt(Vr^2+(Vl-Vc)^2), so I am thinking that in order to have Vs<0 angle , terms Vl-Vc must be zero. So that means the Xc=Xl= 200 Ohm. Am I right about that? Thank you

- #5

gneill

Mentor

- 20,945

- 2,886

Becouse Vs=sqrt(Vr^2+(Vl-Vc)^2), so I am thinking that in order to have Vs<0 angle , terms Vl-Vc must be zero. So that means the Xc=Xl= 200 Ohm. Am I right about that? Thank you

The angle of Vs is not diagnostic unless it's referred to the current angle. That is, you can draw conclusions about the total reactance of the circuit if you know what phase angle the current has with respect to the voltage.

- #6

- 77

- 0

Ok, Thank you. I appreciate your help

- #7

- 1,506

- 18

This means that Xc and Xl are equal and the circuit is at resonance.

It means that the impedance is just the resistance = 400ohms

- #8

- 77

- 0

Thank you technician.

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