calculate R2, so the resonance is still posible ?
C = 40 μF
R1 = 30 ohm
L = 9mH
image : http://postimg.org/image/kampvczv5/
ω = 1/sqroot(L*C)
c = 1/(ω*C)
XL = ω * L
Z = (Z1*Z2)/(Z1+Z2)
The Attempt at a Solution
My approach was to first calculate the resonance frequency ω = 1/sqroot(L*C) = 1667 s-1 than
XL = ω * L ; Xc = 1/(ω*C) == 15ohm, since they have to be the same to cancel out if I'm correct.
And at last got the R2 = 30ohm using the equation Z = (Z1*Z2)/(Z1+Z2) but the right answer should be R2 > 15ohm, so I don't know how to tackle this problem and I'm asking you guys for some advice/solution.
Thanks in advance !