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Calculating Current With Capacitor

  1. Aug 17, 2009 #1
    1. The problem statement, all variables and given/known data
    c) Calculate the current flowing when a 4 uF capacitor is connected across 240V 50 Hz supply ?



    2. Relevant equations

    XC = 1/(2πfC)


    3. The attempt at a solution

    XC = 1/(2πfC)
    XC = 1/(2π 50*0.000004)
    XC = 1/(2π* 0.0002)
    XC = 1/(6.28* 0.0002)
    XC = 1/ 0.001256
    XC = 0.001256

    I'm not sure if this is correct. I would appreciate it if anyone could help me out. Thanks in advance !!
     
  2. jcsd
  3. Aug 17, 2009 #2

    Redbelly98

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    Good so far.
    Nope. Do you see the error?

    XC = 1/0.001256 = ______ ?​

    Once you have the reactance XC, you still need to find the current as asked for.
     
  4. Aug 17, 2009 #3
    Ahh okay thank you !,

    So Xc = 796.178

    Now i know the reactance how i can get the current ? i haven't been able to find a formulae for it.

    Thank you in advance !!
     
  5. Aug 18, 2009 #4

    Redbelly98

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    Here is a hint: the units of XC are Volts/Amps.
     
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