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March 29, 2017

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A friend working on a psychology experiment asks you for help with the design of a simple circuit. She needs an LC timing circuit in which the voltage on a fully charged capacitor drops to zero in 15s . She has a 20H inductor available, but doesn't know what value of capacitor to use. What do you recommend?

  • Physics Dingleberry - ,

    The period of charge oscillation will be

    P = 2*pi*sqrt(L*C)

    In time P/4 , capacitor charge will fall to zero.

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