⚡Have You Ever notice a signboard with
⚠
high Voltage !!
warning!!
danger!!
Ofcourse you have.
Old saying says,
Volt_Jolts_Amp_kills
lets Start. You know Van de Graaff generator . It is able to produce very high voltages, for example, upto 50,000 volts. When someone touches the dome of the generator, it will cause just hair to stand.
Touching the generator is not so dangerous because current is low here. Current is what provides energy to the load. As you pointed out before, ohm's law ties current and voltage together. But a person is not a linear resistor. There are some factor like- frequency, points of current entry and exit etc. So in simple, If there is no charge moving through your body, then you are not going to suffer any harm, absolutely safe. On the other side of coin, a transformer with 220 volt secondary can kill you easily if you touch it because it will force a high current into your body. Low voltage and high current sources can also be dangerous in a different way. A car battery, with just 12-13 volts, is delivering 50-100 amp current. This is more than enough to start a fire. So here we comes to conclusion, high voltage can kill you obviously when it will able to produce a high current through your body and same for the low voltage. Like a 6 V battery can produce just a little current, so you can not get a high shock from it. So power is working behind single 'voltage' word or single 'current' word.
Anyway,
Be Careful While Working On Electrical Appliances…
•Body Resistance :
¡) 500 ohm for wet skin
¡¡) 100 kOhm if skin is dry.
• Permissible Current For human body
¡) 6 mA for 3 sec (for female )
¡¡) 9 mA for 3 sec (for male)
• 10 mA A.C. can Cause muscle contraction.
• More Than 30 mA will cause cardiac arrest.
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