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Suppose some electricity is flowing through a long straight wire without any insulating coating that gives an electric shock to a person at rest relative to the wire on touching it. Is there a speed with which if the person runs along the wire in the direction of current flowing such that he/she does not experience any shock?
Asked by Souradeep Pal Last Modified
Answer 
It is an excellent, thought-provoking question! Suppose a person runs along the direction of electron motion with the same speed of an electron. Then for him, electrons are at rest means zero current in wire for him.
Now if he touches those electrons provided that he is touching the ground with bare feet, then there is a potential difference between his hands and ground. It will make electrons move inside his body towards the ground, and he will feel the shock. So no matter whether he is walking or standing, electrons will run through his body only when there is a potential difference.
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Mitesh Prajapati
Expert Faculty of Physics with Experience of 9 Years. Teaching 11,12,NEET,GUJCET,JEE Courses
Saddam Hussain
IIT Guwahati graduate in Physics. 5 years of experience. Also doing Research in Physics.
Deleted User
Physics major at IIT-J researching in theoretical particle physics.
K R K Karthikeyan
lecturer have 7 years of experience in teaching industry and my education background is mathematics
Never put yourself in a position whereby a muscle contraction would result in clamping your hand around a live conductor involuntarily if you are standing on a rubber mat or any other non-conductive material.
You can touch a live electric wire with one hand without getting an electric shock.
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In every section of the wire, electrons are present, so it is not the previous electron which needs to flow through our body where we go the core after running while touching the wire the electrons from that section will conduct to our body. There will always be current wherever we go or even if we stand due to the potential difference between the wire and Earth and due to the conducting nature of our body.
read less Prachi Pandey
Your answer includes both physical as well as biological reason. First of all, a man cannot match the speed of a moving electron and secondly, it only needs 0.1 seconds for receptors in the skin to take the shocking message to the brain and for the brain to respond towards it. To skip this time for the whole process is also unachievable for a man who is just running.
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