Recent content by kma

Quick question, is 5 milliamps at household voltage like 240 dangerous? See many conflicting views on this, official accounts state that on an electric shock chart, 5ma is nowhere near the level needed to cause any damage but some electricians on reddit say with low body resistance even low...

At lower voltage, the resistance reduces but the reduction levels off and some believe its due to the fact im calculating resistance from current and voltage, and lower values give weirder results. Indications suggest it remains at the level its levelled off to, should i just assume that? I...

But how do i know about higher voltages, i just assume its approximately the same if i scale it up?

Hi, sorry if this post seems quite stressy but I am extremely stuck on this right now. I don't have long to do this course and I have evaluated means of doing this experiment in a safe way (where I literally operate it remotely) but my family do not want me to test 240 volts with this. I have...

Sorry for the late reply. 6 is basically what I want, to see if it roughly obeys ohms law and I am interested in tap water. Its an engineering course and this project talks about electrical safety in the workplace, particularly wet conditions...

So sparking is from the heat?

What do you mean when you say sparks do you mean arcing? and what are you saying may happen? I got consistent resistance similarities when comparing 9v to 36v

Yes I have gathered it likely does follow ohms law, but lots of people say I need to demonstrate it for the purpose of this project...

What the current would be through tap water at mains voltage, some say that scaling up and working it out based on ohms law is not the right thing to do because of electrochemistry at different voltages...

Hi I have a question. I am currently in the middle of a uni project where I am discussing electrical safety of water and I want to work out what the current would be at mains electricity voltage. (240V) I have done many calculations and have eventually got values by calculating resistance at low...

A little hard to get my own data seen as a 240v experiment is not something I'd do but I'd guess the tolerances here are lower than the values measured

What do you mean by error bars? Also note this wasnt my own experiment i was dividing current by voltage from the values in the video

Hi, its been a while since I posted here about what I have been trying to find out regarding resistance of water at high voltages. I may seem oddly obsessed with this but it is forming a big part of a science project I am doing revolving around electrical safety with water and wet things, using...

Is there a safe way of doing that measurement though, and would i expect it to be reduced by much? Like I've posted this video on the forum before, this person did an experiment with high voltages, and whilst there is a reduction of resistance there isn't much... Is this roughly what I'd expect...

What i mean by how much, is how different would the resistance in kohms be at approx 300v compared to 9v, ie if at 9 i get 9kohms if resistance reduces how much would it typically reduce by as you go up to around 300v, and from then up until wein effect, eg. would it reduce by half? And how do...