Safety of Touching Charged Sphere on Insulating Stool

[yitriana]

I can't quite understand why this occurs. When a person is standing on insulating stool, and holds a large metallic sphere, which is charged with generator, why is it safe for him to do this?

Why is it unsafe for another person to touch the sphere after it has been charged?

My guess is that the person standing on the stool is safe because the charge is contained in the sphere because it cannot pass through him to the ground (because of the insulating stool).

However, charge can pass through the person standing on the ground because he is a conductor.

My question is, would it still be unsafe if the other person stood on an insulating stool and then touched the charged sphere?

 

[James Leighe]

It's safe for a person to hold a negatively charged sphere as long as the person holding it is insulated from ground (if he weren't, the charge would flow through him into the ground).

It is safe for any number of people to feel on the sphere as long as they are all insulated. If one person touches the sphere and their toes are dug into the ground all the negative charge will flow right through their chest and into the ground, which can be bad.

(Remember, 'ground' usually means dirt. If you are standing on the floor of a building I would think you would be insulated, and if you have shoes on I would think you would be insulated as well (even when standing on dirt). The dirt is positive because electrical generators are built to do this (I think).)

(Disclaimer, I don't know what I'm talking about... So don't blame me when you get shocked into cardiac arrest because I said you would be safe)

 

[sir-pinski]

The reason it is safe for the person standing on the insulating stool to touch the charged sphere is because the insulating stool prevents the flow of electricity. Insulators, such as rubber or plastic, do not allow electrons to flow through them easily. This means that the person standing on the insulating stool is not in contact with the ground and therefore the charge cannot pass through them. The charge is contained within the sphere and cannot harm the person.

As for why it is unsafe for another person to touch the sphere after it has been charged, this is because they are acting as a conductor. Conductors, such as metal, allow electrons to flow through them easily. When the person touches the charged sphere, the charge can now pass through them and into the ground, potentially causing harm.

To answer your question about whether it would still be unsafe if the other person stood on an insulating stool and then touched the charged sphere, it would still be unsafe. This is because although the person is standing on an insulating stool, their hand is still in contact with the ground, making them a conductor. The charge can still pass through them and into the ground, causing harm.

In summary, the insulating stool acts as a barrier between the person and the ground, preventing the flow of electricity. This is what makes it safe for the person standing on the stool to touch the charged sphere. However, as long as a person is in contact with the ground, they are at risk of being a conductor and allowing the charge to pass through them. Therefore, it is important to always use caution when dealing with charged objects, and to make sure that proper safety measures are in place.