sum of voltages in a series RC cct

Discussion in 'General Electronics Chat' started by aaronaxel, May 31, 2013.

  1. aaronaxel

    Thread Starter New Member

    May 31, 2013
    Hi, i would like to check on a matter.

    I understand that KVL states that the sum of applied voltage and sum of voltage drops in a close loop equates to zeor volts.

    however, in a seires RC circuit, the applied voltage Vin squared equals to voltage drop across rsistor squared + voltage acroos capacitor squared.

    i do not really comprehand the squared function.

    Isnt it suppose to be Vin = VR+ VC

    Thank you for any help in understanding this.
  2. MrChips


    Oct 2, 2009
    No. For RCL circuits, you have to add the vectors or use addition of complex values.
    You have to take into consideration that with C and L the currents will be 90 degrees out of phase with the voltage.