Question

why are not shocked the dc current

Answer 1

   Dc current also causing electric shock ,Both AC and DC supply can give an electric shock to a person. The severity of the shock depends on the voltage-current-time product.AC cause a series of contractions, depending on the frequency. More DC current is needed to have same effect of electric current as AC.
   Direct Currents actually have zero frequency, as the current is constant. However, there are physiological effects during electrocution no matter what type of current.The factor deciding the effects of the AC and DC current is the path the current takes through the body. If it is from the hand to the foot, it does not pass through the heart, and then the effects are not so lethal.However DC current will make a single continuous contraction of the muscles compared to AC current, You can get more information's form following link
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