What does a negatively charged object end up?

[kenny1999]

If an object contains more electrons than protons it will become a negatively charged object is that right?

Two questions here:

In practical situation, how to make an object slightly negative charged? If I simply put a USB charging cable designed for mobile phone (connected to the mains) is it enough to make an object negatively charged?

When an object becomes negatively charged, how will it end up? Do the electrons stay in the object long time or forever or do they go into air? or do they go to the ground?

[Genady]

28 minutes ago, kenny1999 said:

(1) If an object contains more electrons than protons it will become a negatively charged object is that right?

(2) In practical situation, how to make an object slightly negative charged?

(3) If I simply put a USB charging cable designed for mobile phone (connected to the mains) is it enough to make an object negatively charged?

(4) When an object becomes negatively charged, how will it end up? Do the electrons stay in the object long time or forever or do they go into air? or do they go to the ground?

1. Right.

2. Friction, induction, electrolysis, photoconductivity.

3. No.

4. Depends.

[studiot]

1 hour ago, kenny1999 said:

Two questions here:

58 minutes ago, Genady said:

1. Right.

2. Friction, induction, electrolysis, photoconductivity.

3. No.

4. Depends.

+1 for helping kenny count up to 4.

 

However be careful about   'induction'.  Mostly induction only redistributes charges in a body. Extra charge have to come from somewhere else, by the law of conservation of charge.

[Genady]

1 hour ago, studiot said:

+1 for helping kenny count up to 4.

 

However be careful about   'induction'.  Mostly induction only redistributes charges in a body. Extra charge have to come from somewhere else, by the law of conservation of charge.

Alternatively, they could have two conductors attached, the charges redistributed by induction, and then the conductors detached, one positively and another negatively charged. 

[kenny1999]

Is induction like the picture attached illustrating?

Does it only apply to metals? What if it's non-metal or other things like wood or plastic, could they still be charged a little bit?

For the charged metal spheres, i.e. the positive one and the negative one. After they are separated, what will happen to them? Attracting electrons or other molecules from the surrounding air?

Edited December 19, 2022 by kenny1999

[Genady]

3 hours ago, kenny1999 said:

Is induction like the picture attached illustrating?

Does it only apply to metals? What if it's non-metal or other things like wood or plastic, could they still be charged a little bit?

For the charged metal spheres, i.e. the positive one and the negative one. After they are separated, what will happen to them? Attracting electrons or other molecules from the surrounding air?

Yes.

It applies to good electrical conductors.

They will eventually discharge via air.

[kenny1999]

12 hours ago, Genady said:

Yes.

It applies to good electrical conductors.

They will eventually discharge via air.

How do they discharge via air? What molecules will react with them?

Will they discharge via ground?

[Genady]

1 minute ago, kenny1999 said:

How do they discharge via air? What molecules will react with them?

Will they discharge via ground?

If they are not electrically insulated from the ground, they discharge via ground.

The other questions above would be better answered by better informed people.