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Working of capacitor in shock pen

  1. Jan 24, 2015 #1
    Can anyone explain the use of capacitor in a shock pen
     
  2. jcsd
  3. Jan 24, 2015 #2
    It stores the energy - the key part of most of these is an inductor and switch. Current flows in the inductor and then a switch interrupts the current flow and a large voltage is produced. The V = L * dI/dt
     
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