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Peak current during discharge

  1. Mar 22, 2012 #1
    1. The problem statement, all variables and given/known data

    When a person shuffles across a dry carpet, their body can be modeled as a charge 100-pF capacitance with one end grounded. Then, if the person touches a grounded metallic object such as a water faucet, the capacitance is discharged and the person experiences a brief shock. Typically, the capacitance may be charged to 20,000 V and the resistance (mainly of one's finger) is 100Ω. Determine the peak current during the discharge and the time constant of the shock.

    C=100 pF
    V=20,000 V
    R= 100 Ω

    2. Relevant equations


    3. The attempt at a solution

    I already Found T=.01 μS
    just stuck at the peak current during discharge
  2. jcsd
  3. Mar 22, 2012 #2


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    Staff: Mentor

    Well, when the "switch closes", so to speak, what initial voltage sees what resistance in its path on its way to ground?
  4. Mar 22, 2012 #3
    200 a ?
  5. Mar 22, 2012 #4


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    Staff: Mentor

    Make that 200 A (capital A for Amperes) and I'll agree :smile:
  6. Mar 22, 2012 #5
    I attempted three times to make it capital. not sure why it wont let me. Thanks for the help
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