how does electricity cause death?

Answer 1

Burns
Tissue heating due to resistance can cause extensive and deep burns. High-voltage (> 500 to 1000 V) shocks tend to cause internal burns due to the large energy (which is proportional to the square of the voltage) available from the source. Damage due to current is through tissue heating.

Ventricular fibrillation
A low-voltage (110 to 220 V), 50 or 60-Hz AC current traveling through the chest for a fraction of a second may induce ventricular fibrillation at currents as low as 60mA. With DC, 300 to 500 mA is required. If the current has a direct pathway to the heart (e.g., via a cardiac catheter or other electrodes), a much lower current of less than 1 mA, (AC or DC) can cause fibrillation. Fibrillations are usually lethal because all the heart muscle cells move independently. Above 200mA, muscle contractions are so strong that the heart muscles cannot move at all.

Neurological effects
Current can cause interference with nervous control, especially over the heart and lungs.

When the current path is through the head, it appears that, with sufficient current, loss of consciousness almost always occurs swiftly. (This is borne out by some limited self-experimentation by early designers of the electric chair and by research from the field of animal husbandry, where electric stunning has been extensively studied) [1].

Arc-flash hazards
Over 80% of all injuries and fatalities caused by electrical incidents are not caused by electric shock, but by the intense heat, light, and pressure wave (blast) caused by electrical faults. The arc-flash in an electrical fault produces the same type of light radiation from which electric welders protect themselves using face shields with dark glass, heavy leather gloves, and full-coverage clothing. The heat produced may cause severe burns, especially on unprotected flesh. The blast produced by vaporizing metallic components can break bones and irreparably damage internal organs. The degree of hazard present at a particular location can be determined by a detailed analysis of the electrical system, and appropriate protection worn if the electrical work must be performed with the electricity on. Worker safety standards in the USA require, though, that the electricity be turned off before work is performed unless a greater hazard will result from turning the power off.

Answer 2

Any source of electricity with voltage high enough to cause sufficient current flow through the muscles or nerves causes electric shock. The minimum detectable current in humans is thought to be about 1 milliampere (mA). If the current is sufficiently high it may cause tissue damage especially in the heart which causes heart fibrillation termed as ventricular fibrillation. Fibrillations are usually lethal because all the heart muscle cells move independently. Above 200mA, muscle contractions are so strong that the heart muscles cannot move at all. When this happens, death is expected within a very short period.

Its effects on the nerves got strong impact on the nervous system where the functions of the heart and lungs as the vital organs are largely affected leading to death. The intense heat, light, and pressure wave (blast) caused by electrical faults may result to severe burns or severe damage to the system (specifically the internal organs) which can lead to death.

Answer 3

Electrocution occurs when a small, specific amount of electrical current flows through the heart for 1 to 3 seconds. 0.006-0.2 Amps (that's 6-200mA milliamps) of current flowing through the heart disrupts the normal coordination of heart muscles. These muscles loose their vital rhythm and begin to fibrilate. Death soon follows

Answer 4

Depends on the strength of the shock, if the current travels thru the heart it disrupts the hearts own natural current. Or if the voltage is high enough it causes the inside of the body to burn/cook.

Answer 5

Voltage is the distinction in electric powered skill between 2 factors in a circuit. Even tens of millions of volts couldn't even damage you. you want intense amperes to kill someone. The human body is likewise a terrible conductor, it ought to easily shop somewhat intense voltage yet very low amp electrical energy (static)

Answer 6

by current hitting ure head

Answer 7

it stops the heart