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AC current and capacitors

  1. Nov 3, 2008 #1
    A coil, a capacitor and an AC source of RMS voltage 24 V are connected in series. By varying the frequency of the source, a maximun RMS current of 6 A is observed. If this coil is connected to a battery of emf 12 V and internal resistance 4 [itex]\Omega[/itex], the current through it will be
    (a) 2.4 A
    (b) 1.8 A
    (c) 1.5 A
    (d) 1.2 A
     
  2. jcsd
  3. Nov 3, 2008 #2

    Redbelly98

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    Re: Current

    You'll need to show your own attempt at solving this before receiving help. (Forum rules)
     
  4. Nov 5, 2008 #3
    Re: Current

    For maximum RMS current, the inductor and capacitor are at resonance; is that right?
     
  5. Nov 6, 2008 #4

    Redbelly98

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    Re: Current

    Yes.
     
  6. Nov 6, 2008 #5
    Re: Current

    Thanks!
     
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