Today we are going to talk about topic which one kills human body either voltage or current. before going to the subject, first we should know what is voltage and current.
voltage is also called electromotive force, is a quantitative expression of the potential difference in charge between two points in an electrical field. Voltage is symbolized by an uppercase italic letter V or E. The standard unit is the volt, symbolized by a non-italic uppercase letter V. Voltage can be direct or alternating. A direct voltage maintains the same polarity at all times. In an alternating voltage, the polarity reverses direction periodically.
Current is a flow of electrical charge carriers, usually electrons or electron-deficient atoms. the current is normally measured by Amps and its denoted the symbol A. DC (direct current) is the unidirectional flow or movement of electric charge carriers (which are usually electrons). In electricity, alternating current (AC) occurs when charge carriers in a conductor or semiconductor periodically reverse their direction of movement.
which kills human body?
|Current (AC)||Effect of human body|
|16mA||Maximum amps before you can’t let go|
|20mA||Paralysis of respiratory muscles|
|100mA||Ventricular fibrillation starts|
|2Amps||Cardiac standstill and organ damage|
|Current (DC)||Effect of human body|
|15-88mA||Maximum amps before you can’t let go|
|300-500mA||Ventricular fibrillation starts|
Major parts of our body skin is act as resistance. the resistance is nothing but the opposition that a substance offers to the flow of electric current. so normal human body having the resistance value 100000 ohms. so human body can withstand >30 volts. if voltage is increase then resistance will be reduce.
for example 440 volts flow through our body then our skin is broken and electricity will pass easily.
suppose our skin in wetness then our resistance value will be reduced to 1000 ohms only.
so don’t touch any electrical panel/parts whether your skin in wet condition.