RLC Circuits

Discussion in 'Homework Help' started by KatCreator, Oct 27, 2010.

  1. KatCreator

    Thread Starter New Member

    Oct 27, 2010
    A series ​
    RLC circuit is driven at a frequency
    of 550 Hz. The phase angle between the ap-
    plied voltage and current is determined from
    an oscilloscope measurement to be 75.
    If the total resistance is known to be 40
    and the inductance is 0.15 H, what is the
    capacitance of the circuit?​

    Answer in units of μF.

    I really dont need much help, I was just wondering if I can use the 75 degrees as it is as the phase angle. Or do I have to convert it to radians, or something else?

    And I use this equation, right?

  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    Yes just take the tan(75°) value to give you the total reactance to resistance ratio - as you have shown.