Help with a finding XL, Z and L question...

[Dave Rudderham]

Is there a way to find XL without knowing the value of the Inductor?

I have a question where R is given as a value of 100v/10A = 10R
It then goes on to say the supply is changed to 100v~(rms) at 20ms (which is 50c/s) and the measured current is 6A. It then asks you to find the "overall impedance, inductive reactance and the inductance of the coil."

So Z = sqrt of (R^2 + XL^2) and XL = 2piFL but how do you find XL without knowing the inductance of the coil.

 

[Dave Rudderham]

Think I've had a eureka moment. As Z=sqrt(R^2+XL^2) and Z=V/I, XL must = sqrt(Z^2-R^2)

If someone can give me an idea if the penny has dropped in the right place that'd be grand.