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Course Outline - Madeeha Owais
Course Outline - Madeeha Owais

Physics Electrostatics: Electric Field Diagrams
Physics Electrostatics: Electric Field Diagrams

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Is magnetic field due to an electric current a relativistic effect?

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... Today, we have other explanations of the electric charge quantization; in particular the Grand Unification of strong, weak and electromagnetic interactions at extremely high energies produces quantized electrical charges. Curiously, the same Grand Unified Theories also predict that there are magneti ...
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... SSM WWW REASONING Two forces act on the charged ball (charge q); they are the downward force of gravity mg and the electric force F due to the presence of the charge q in the electric field E. In order for the ball to float, these two forces must be equal in magnitude and opposite in direction, so t ...
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Electrostatic Forces and Fields

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File - Mr. Walsh`s AP Chemistry

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... What is true about the x and y components of the fields from charges A and B at point P? A) They both add B) They both cancel C) The x components add and the y components cancel D) The x components cancel and the y components ...
The Mechanics of a Lightning Strike
The Mechanics of a Lightning Strike

< 1 ... 234 235 236 237 238 239 240 241 242 ... 424 >

Electric charge



Electric charge is the physical property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of electric charges: positive and negative. Positively charged substances are repelled from other positively charged substances, but attracted to negatively charged substances; negatively charged substances are repelled from negative and attracted to positive. An object is negatively charged if it has an excess of electrons, and is otherwise positively charged or uncharged. The SI derived unit of electric charge is the coulomb (C), although in electrical engineering it is also common to use the ampere-hour (Ah), and in chemistry it is common to use the elementary charge (e) as a unit. The symbol Q is often used to denote charge. The early knowledge of how charged substances interact is now called classical electrodynamics, and is still very accurate if quantum effects do not need to be considered.The electric charge is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields. The interaction between a moving charge and an electromagnetic field is the source of the electromagnetic force, which is one of the four fundamental forces (See also: magnetic field).Twentieth-century experiments demonstrated that electric charge is quantized; that is, it comes in integer multiples of individual small units called the elementary charge, e, approximately equal to 6981160200000000000♠1.602×10−19 coulombs (except for particles called quarks, which have charges that are integer multiples of e/3). The proton has a charge of +e, and the electron has a charge of −e. The study of charged particles, and how their interactions are mediated by photons, is called quantum electrodynamics.
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