Strength of Electric Current

I never had a good feel or the measure of the strength of electric current. Had questions like what’s the power of a current when they say 1A, 100 A or say 200 mA and so on. You don’t get a picture

I was reading Floyd’s Electrical Fundamentals this morning. Very well illustrated book for electrical engineers.
It has a section on Electric shock.

Electric shock is actually caused by the flow of electric current and not voltage.
But for electric current to flow we should have a voltage and resistance.

Our body has a resistance typically from 10K ohm to 50k ohm
If you touch a voltage source of 90 V, you would receive 9 mA of current, which is dangerous.

1 mA – Slight perception
10 mA – mild shock
20 mA – severe mild shock
200 mA – Could be fatal if it lasts for 5 seconds
4 A – Heart paralysis ( which 4000 mA )
5 A – Could burn the tissue and could be worse.

So when you look at ratings on the electrical appliances next time, hope you’ll have some idea of how strong the current is.