A fundamental property of matter which causes it to experience electromagnetic forces.
Questions tagged [charge]
3344 questions
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What is the maximum surface charge density of aluminum?
I understand that the maximum free charge carrier density for aluminum has been measured using the Hall effect (in the case of electric current). However, I'm not clear how to determine the maximum surface charge density to which aluminum (or any…
thrusty
- 133
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Physical Consequence of Global Charge Conservation versus Local Charge Conservation?
Gauge invariance of the electromagnetic field implies local charge conservation. If the gauge is no longer invariant, then the electromagnetic field must no longer conserve charge locally. Is it possible either physically or mathematically, to break…
linuxfreebird
- 2,107
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Force between charges
Let us take two opposite charges are moving away from each other in directly opposite direction ......it's obvious that kinetic energy of both of them will decrease as both of them are attracting each other .So can we say both the particles are…
It's probable
- 529
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What is a charge?
If mass is the measure of the inertia of a body, then what is a charge?
Everyone tells that it is a fundamental property but i believe it must have a unique definition. Anyone know in this regard?
user111211
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Fully Ionic Grapefruit
Imagine I take a small grapefruit (about 100 grams), and a magic wand, and use the magic wand to :
Remove all the electrons from my grapefruit.
Prevent said grapefruit from exploding into a thin plasma.
What would be the force of the electrical…
Serban Tanasa
- 332
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Can a negative charge ionize air?
Can a negative charge ionize air? Adding to this question, I have studied that positive charge ionizes air but never studied that negative charge ionize air. If possible, please explain how does it ionize air?
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Why is contact necessary for charge transfer?
I’m familiar with the idea of polarity and I know you can induce separation of charges within an object. But why can’t actual transfer from surface to surface (i.e. triboelectric effect) occur without actual contact?
capriisun
- 51
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What is the essence of electric charge?
What is the essence of electric charge? Is it an independent object carried by the charged particles, or simply some kind of property of charged particles?
Shen
- 1,633
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How to discharge a plastic surface?
In a plastic sheet surface, how to make the surface charge disappeared ?
Chui Sin Min
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Surface charge on a straight region of a conductor
Most physics textbooks and even questions in stack exchange answer the question why there exists a charge buildup in the bends of a current carrying conductor.
But what I am unable to understand is:
why a surface charge gets developed in the…
Danny Paul
- 111
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What molecules are ionized in a lifter ion engine?
Lifters generate lift through ionizing air molecules and then attracting those ions toward an oppositely charged surface to create thrust. are constructed on a balsa frame with a 1 inch wide aluminum foil strip positioned vertically 1 cm above a…
Dale
- 6,014
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How does something acquire postive charges?
I understand that an object becomes postively charged when it looses electrons.
I was curious, at 5:45 of this video Electronics at Work - 1943 (https://www.youtube.com/watch?v=hwutHPYGgfU), how does the particles loose their electrons and acquire…
Yellow Dinosaur
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What is the definition of a stationary charge compared to a moving charge?
A stationary charge produces an electric field and a moving charge produces a magnetic field. What defines a stationary charge in this regard. Does it just mean that electrons are not flowing in a wire? Or does it mean that electrons are not…
foolishmuse
- 4,551
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Infinitesimal amount of charge
How can we take an infinitesimal amount of a point charge of charge $q$? Doesn't infinitesimal charge means the smallest object?What could be smaller than a point?
YouTube: JEE ADVANCED | ORIGINALS | DIPOLE BETWEEN CONDUCTING PLATES |INDUCED CHARGE…
green_blue
- 21
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Is the maximum possible charge on an object asymmetrical with regard to polarity?
I am not a physicist so I am not sure how to check my intuition. Hence my question here.
Suppose I wish to charge a sphere to the maximum extent.
Intuitively I imagine the following:
I can give the sphere an indefinite amount of negative charge by…
chasly - supports Monica
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