John Travoltage (Electo and magnatesim concept questions)

[slangfo1]

Homework Statement

http://enjoy.phy.ntnu.edu.tw/data/458/www/simulations/sims5326.html?sim=John_Travoltage#ideas"
Hi, I am new here and I am taking Electro physics over at the University of Tennessee. I don't know how to integrate yet and i realized that i would need some help with this class.. I've read the chapter that this is over and i have a good idea of the answers, i would just like yall to check my work.

Homework Equations

A: What are the blue circles and why do they accumulate on him?
B:what and why do they settle if you quit rubbing his foot?
C: Quantitatively, how does john's mass if he gains a net charge of -.75 coulombs? Because of Conservation of mass, what lost the equivalent mass?
D:What happens as you move John's hand to the knob when he is strongly charged? why?
E :What would have happened if john was holding the knob as you moved his foot across the carpet?
F: what would have happened if the knob had a rubber or ceramic handle?
G You touch john's foot very lightly (under 15 charges) and hold his hand out to the knob. What happens and why?

The Attempt at a Solution

A: electrons, they get stripped of the carpet by rubbing his shoe on it.
B:They move mostly to one side of him, because one side of him becomes positive and the other negative?
C:no idea
D: The electrons get discharged to the door knob. Electrons are moving to a proton rich area?
E:Electrons flow from his feet and to the door handle.
F:The electrons would remain in his body.
G:Nothing, the door handle has enough electrons on the surface of it to repel the electrons in john?

Please check my answers out and help me expand mine if they don't seem very good, and thank you for your help

 

[berkeman]

Homework Statement

http://enjoy.phy.ntnu.edu.tw/data/458/www/simulations/sims5326.html?sim=John_Travoltage#ideas"
Hi, I am new here and I am taking Electro physics over at the University of Tennessee. I don't know how to integrate yet and i realized that i would need some help with this class.. I've read the chapter that this is over and i have a good idea of the answers, i would just like yall to check my work.

Homework Equations

A: What are the blue circles and why do they accumulate on him?
B:what and why do they settle if you quit rubbing his foot?
C: Quantitatively, how does john's mass if he gains a net charge of -.75 coulombs? Because of Conservation of mass, what lost the equivalent mass?
D:What happens as you move John's hand to the knob when he is strongly charged? why?
E :What would have happened if john was holding the knob as you moved his foot across the carpet?
F: what would have happened if the knob had a rubber or ceramic handle?
G You touch john's foot very lightly (under 15 charges) and hold his hand out to the knob. What happens and why?

The Attempt at a Solution

A: electrons, they get stripped of the carpet by rubbing his shoe on it.
B:They move mostly to one side of him, because one side of him becomes positive and the other negative?
C:no idea
D: The electrons get discharged to the door knob. Electrons are moving to a proton rich area?
E:Electrons flow from his feet and to the door handle.
F:The electrons would remain in his body.
G:Nothing, the door handle has enough electrons on the surface of it to repel the electrons in john?

Please check my answers out and help me expand mine if they don't seem very good, and thank you for your help

Welcome to the PF.

So were your answers correct?

 

[slangfo1]

Thanks for the welcoming. I don't know yet, Its part of a very large very difficult n assignment that is due Friday.

 

[slangfo1]

Ok, I am pretty sure i got this questions. i used diminsional analysis to solve for the weight change from the electrons.

 

[rwisz]

Hello John, welcome to the world of electro physics! It's great to see that you are already familiar with the concepts and have a good understanding of the material. Let's go through your questions one by one:

A: The blue circles represent electrons, which get stripped from the carpet when John rubs his feet on it. These electrons then accumulate on John's body, giving him a negative charge.

B: When John stops rubbing his feet, the electrons on his body settle to one side because they are attracted to the positive charges on the other side of his body. This creates an electric field between the positive and negative charges, causing the electrons to move to one side.

C: If John gains a net charge of -0.75 coulombs, his mass would not change. This is because the mass of an object is not affected by its charge. The concept of conservation of mass states that matter cannot be created or destroyed, so the equivalent mass is not lost.

D: As John's hand moves closer to the knob, the electric field between his hand and the knob increases. This causes a stronger attraction between the electrons on his hand and the positive charges on the knob, resulting in a discharge of electrons. This discharge is what causes the shock when you touch a charged object.

E: If John was holding the knob while rubbing his feet on the carpet, the electrons would flow from his feet to the knob. This would result in a discharge of electrons from his body, giving him a neutral charge.

F: If the knob had a rubber or ceramic handle, the electrons on John's body would not be able to flow through it. This would prevent the discharge of electrons and John would remain negatively charged.

G: If you touch John's foot lightly and then hold his hand out to the knob, nothing would happen. This is because the small number of electrons on his foot are not enough to create a significant electric field between his body and the knob. Therefore, there would be no discharge of electrons.

I hope this helps to expand your understanding of the concepts. Keep up the good work in your electro physics class!