30/06/2015
Which is Dangerous? AC or DC??
Direct current (DC),because it moves with continuous motion through a conductor,has the tendency to induce muscular tetanus quite readily.Alternating current (AC),because it alternately reverses direction of motion, provides brief moments of opportunity for an afflicted muscle to relax between alternations. Thus, from the concern of becoming "froze on the circuit," DC is more dangerous than AC.However, AC' nature has a greater tendency to throw the heart' space maker neurons into a condition offibrillation, whereas DC tends to just make the heart stand still. Once the shock current is halted, a "frozen" heart has a better chance of regaining a normal beat pattern than afibrillating heart. This is why "defibrillating"equipment used by emergency medics works: the jolt of current supplied by the defibrillator unit is DC,which halts fibrillation and gives the heart a chance to recover.
and Dc current is more
dangerous than ac because
the voltage is Dc is same I.e
240volt but in ac the
average voltage is 110volt by
the cause of rms......
