Inductance of the coil?

  1. Inductance of the coil??

    1. The problem statement, all variables and given/known data
    A radio has a tuning circuit consisting of a variable capacitor and antenna coil. IF the circuit has a maximum current when C=300pF and f=40kHz, what's the inductance of the coil??

    2. Relevant equations

    f= 1/(2pi root (LC))

    3. The attempt at a solution

    L=[1/(2pi(40000))]^2 times 1/(300E-12)

    But, I didn't get the answer :52.8x 10^3 was the answer;;
  2. jcsd
  3. ehild

    ehild 12,940
    Homework Helper
    Gold Member
    2014 Award

    Re: Inductance of the coil??

    The right answer is 52.8x10^(-3) H.

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