Register to reply

Shock from dc current

by samieee
Tags: current shock
Share this thread:
samieee
#1
Mar15-10, 02:31 AM
P: 71
I have heard that 'we don't get shock from dc current because it is constant but we get shock from ac current because it is alternating'.Is that true? If it is HIGH VOLTAGE DC CURRENT THEN?
Phys.Org News Partner Engineering news on Phys.org
ESA investigates an alternative, environmental-friendly method of corrosion resistance
The oscillator that could makeover the mechanical watch
Engineers study bats to improve aviation travel
samieee
#2
Mar15-10, 02:35 AM
P: 71
If the amount of current passing through our body breaks the resistance of it then what we feel is called electric shock isn't it? then I think we must get shock from dc current if the amount is considerably high (that means breaks our resistance)
Studiot
#3
Mar15-10, 02:57 AM
P: 5,462
Is that true?
Most definitely not true.

Whoever told you this may be referring to a classroom demonstration where someone is invited to touch a single high voltage terminal (for example in a Van der Graff generator), whilst being carefully insulated from the rest of the planet.
This can safely be done by most people.

However as a general rule it is a very bad idea to touch electric terminals.

Mike_In_Plano
#4
Mar15-10, 02:59 AM
P: 560
Shock from dc current

When the voltages / currents are low, low frequency AC is more discernible. However, when you go up in voltage, both become jolting and painful.
High frequency AC (i.e. > 1MHz) gets to where you don't notice shock, but you can get severe penetrating burns before you notice something's happening.
samieee
#5
Mar15-10, 08:31 AM
P: 71
though there is debate which one is more dangerous, I think dc is more because ac current will flow through the skin rather than heart due to skin effect
Studiot
#6
Mar15-10, 12:52 PM
P: 5,462
The skin effect has nothing whatsoever to do with human (or animal) skin.

Sam, please get some proper advice about electrical safety before real harm is done.


Register to reply

Related Discussions
Extremely high-voltage yet extremely weak-current electric shock - symptoms? General Physics 7
Extremely high-voltage yet extremely weak-current electric shock - symptoms? General Physics 0
Can you shock someone?y Electrical Engineering 17
PDE + shock Calculus & Beyond Homework 4
Shock and Awe, huh? Current Events 72