ac theory

Discussion in 'Homework Help' started by ormesher, Nov 12, 2007.

  1. ormesher

    Thread Starter New Member

    Sep 23, 2007
    ive answered the following question but would like some confirmation that this i correct.

    A resistor of 250 ohms is connected in series with a 1.5H inductor, across a 100V, 50 hz supply. calculate a) the current flowing, b) the phase angle, c) the p.d. (voltage) across each component and d) the power dissipated.

    a) 0.187 amps
    b) 62.07 degres
    c) inductor = 88.2 Volts, resistor = 46.5 Volts
    d) please help, i cant find the correct formula for the power dissipated.

    Am i correct? your help would be much appreciated
    thanks keith
  2. beenthere

    Retired Moderator

    Apr 20, 2004
    As long as you have RMS values, P = I^2*R or I * E