Question

please explain in details. thanks

1. What is a defibrillator? And how does it work? Explain in detail. ( explain it in a minimum of 3 to 4 paragraphs in details) 2. What is the Resistors for human skin? Explain in details 3. How long can you apply Electric currents to the human body? Explain in details 4. Why can we only apply electric currents for a short time in the human body? Explain

Answer 1

Defibrillatos ta ' when heart's natural pacemaker cloesn't wastes properly heart may bead too flas fast, too slow or imegularly. Then doctors Implant a small electric device with regulates heart beat rythm. This device is implanted in upper chest beneth the coler bone. This stopwatch size device is connected to heart with two lexible wires. 1 This battery powered device sends small paintess electric pulse when heart rate is too Last or irregular. That pulse corrects the haterat heart rate. If heart rate irregulation contihues defibrillator sends a life saving shock, which. corrects the heart rate. (6) The resistance of human skin vories from person to person. But for dry skin resistance can be as high as 100 k ohms and for wet skin the resistance can drop to 1000 ohms. Also broken skin has less resistance same as 1000 ohms. So high voltage quickly breaks downs the skin and reduces resistance equal to human body resistance (soon) | The damage to human body is due to head generated by voltage applied, which burns skin and also internal tissues in case of high voltage. Because voltage results in high amount of cussent flow, and we know- H = I²Rt He heat I current Ra resistance t time. a So till when value of n, doesn't exped human I body temperature , it can be considered safe. To As explained above heat is very less for a shost time and small elechic pulse does its work to function the heart (or any other organ) well. & The more time for cussent is applied, more is the heat generated and mose damage to body.