Tagged Questions
0
votes
1answer
14 views
Lightning and Charge Displacement
There is something I don't really understand about flashes of lightning.
When a flash occurs, how come electricity be transferred at the speed of light since electricity's displacement is very slow ?
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3
votes
1answer
52 views
Why does the comb attract the pieces of papers if they're neutral?
When we rub our hairs with a comb, and then try to attract small pieces of paper, they're attracted by the comb. The pieces of the paper were not electrified before they were attracted. Then they ...
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vote
0answers
12 views
Early Concepts in Relation with the Forces Produced When Certain Pairs of Objects are Rubbed Together
It was found centuries ago that these materials: wool cloth and paraffin wax, glass rod and silk cloth when rubbed against each other attracted one another. While two glass rods when rubbed against ...
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1answer
43 views
What types of materials can be electrically charged by rubbing?
What types of materials can be electrically charged by rubbing? Is there a certain type of materials in which static electricity can be produced by rubbing together two different materials?
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2answers
76 views
Definition of electric charge and proper explanation
Is there a definition of electric charge and proper explanation of it?
It is said "Electric charge is the physical property of matter that causes it to experience a force when close to other ...
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votes
1answer
42 views
Charging Glass Rods
When we rub two glass rods with their respective pieces of silk cloth, the two glass rods would repel each other. What if we rub the glass rod against the other glass rod? Will they repel each other? ...
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votes
2answers
51 views
Definition of Static Electricity
The result of an imbalance of electrons between objects is called static electricity. It is called "static" because the displaced electrons tend to remain stationary after being moved from one ...
1
vote
1answer
52 views
Why do aqueous solutions always “have to be” electrically neutral?
I was reviewing some analytical chemistry and stumbled upon a section that explained the imperfection of using a salt bridge.
It said that the using dissimilar ions is a problem because in, for ...
0
votes
1answer
109 views
Does the electric field inside a sphere change if point charge isn't in center?
As i understood , if you have a point charge in the center of a hollow conducting sphere then the electric field inside it, is zero because the charge distribution is spherically symmetric.
But ...
4
votes
2answers
493 views
What happens to capacitor’s charge when the plates are moved further apart?
In my physics textbook there is an example of using capacitor switches in computer keyboard:
Pressing the key pushes two capacitor plates closer together, increasing their capacitance. A larger ...
1
vote
1answer
57 views
Charged plane in an electric field acceleration
A perpendicular plane to an electric field's lines of force has more electric flux than a plane that is in parallel with the lines of force, right?
Does this mean that a charged plate would ...
0
votes
0answers
79 views
short question - charge [closed]
Four identical metal spheres have charges of q1=-8.0 micro C,q2 =-2.0 micro C, q3 =+5.0 micro C, and q4 =+12.0 micro C.
Three of the spheres are brought together so they touch, and then they are ...
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votes
0answers
33 views
Why $Q_{f}$ on glass ~ $12Q_f$ on air in Leyden Jar Expt?
I watching a video lecture on the internet and at at about 46:55 the professor says that the free charge ($Q_f$) on the glass is about 12 times that of air in an experiment with a Leyden Jar. He says ...
1
vote
1answer
216 views
Excess charge on an insulator and conductor
So I was recently wondering what happens to the excess charge when it is placed on an insulator or conductor e.g. rubbing two objects together. I know in the conductor the electrons are free to move ...
4
votes
2answers
244 views
Sum total distance of electrons on a spherical surface
What is the sum total distance between every possible pair of point charges when there are n point charges on a spherical surface?
All point charges can only and are located on the infinitesimal ...
11
votes
4answers
2k views
Why is the charge naming convention wrong?
I recently came to know about the Conventional Current vs. Electron Flow issue.
Doing some search I found that the reason for this is that Benjamin Franklin made a mistake when naming positive and ...
