How do I find the total impedance?

Aria Nemati

Joined Jul 19, 2019
27
This is my circuit

Im asked to find the total impedance. So far Ive been able to find the impedance of all the individual components.

How do I proceed from here and get the answer in the correct form?

The answer should be:

Last edited:

Aria Nemati

Joined Jul 19, 2019
27
I see that 72.11 is equal to sqrt ( (40)^2 + (-60)^2 ) but from where do we get the angle?

TechWise

Joined Aug 24, 2018
151
You have the answer in "rectangular" form. This means you have a complex number with a real term and an imaginary term.

The solution is given in "polar" form which means that you need magnitude and a direction. Google "rectangular to polar conversion" and you should find what you're looking for.

Aria Nemati

Joined Jul 19, 2019
27
Nevermind, I forgot to change back from radians to degrees. Thats why I didnt get the correct angle.

WBahn

Joined Mar 31, 2012
26,398
Nevermind, I forgot to change back from radians to degrees. Thats why I didnt get the correct angle.
Units are critically important. So even though angular measure in radians is technically dimensionless, it is a very good idea to explicitly write "rad" as the unit when you are using radians so that you have a smoking gun screaming at you that the two values are not using the same units.