Chapter19-Magnetism and Electricity
... Same electric charges repel each other. Unlike ones attract. Unlike magnetic poles, electric charges can exist alone. Electric field: an electric charge exerts a force through the electric field that surrounds the charge. When a charged particle is placed in the electric field of another charged par ...
... Same electric charges repel each other. Unlike ones attract. Unlike magnetic poles, electric charges can exist alone. Electric field: an electric charge exerts a force through the electric field that surrounds the charge. When a charged particle is placed in the electric field of another charged par ...
current density J
... •Perfect conductors carry charge instantaneously from here to there •Perfect insulators carry no charge from here to there, ever •Real substances always have some density n of charges q that can move, however slowly •Usually electrons •When you turn on an electric field, the charges start to move wi ...
... •Perfect conductors carry charge instantaneously from here to there •Perfect insulators carry no charge from here to there, ever •Real substances always have some density n of charges q that can move, however slowly •Usually electrons •When you turn on an electric field, the charges start to move wi ...
Week3-Week4. - WordPress.com
... Kirchhoff's circuit laws • Kirchhoff's circuit laws are two approximate equalities that deal with the current and potential difference (commonly known as voltage) in electrical circuits. They were first described in 1845 by Gustav Kirchhoff. This generalized the work of Georg Ohm and preceded the ...
... Kirchhoff's circuit laws • Kirchhoff's circuit laws are two approximate equalities that deal with the current and potential difference (commonly known as voltage) in electrical circuits. They were first described in 1845 by Gustav Kirchhoff. This generalized the work of Georg Ohm and preceded the ...
Physics 202 Final Exam .doc
... 36. The experimental proof of the constancy of the speed of light a. Einstein b. ~ Michelson & Morley c. Balmer d. Heisenberg 37. Imagine you are in a room with a uniform magnetic field of 12 T toward the front of the room. There is a rectangle of wire (one strand) measuring 2 m by 5 m at an angle ...
... 36. The experimental proof of the constancy of the speed of light a. Einstein b. ~ Michelson & Morley c. Balmer d. Heisenberg 37. Imagine you are in a room with a uniform magnetic field of 12 T toward the front of the room. There is a rectangle of wire (one strand) measuring 2 m by 5 m at an angle ...
electric field
... The number of lines drawn leaving a positive charge or ending on a negative charge is proportional to the magnitude of the charge No two field lines can cross each other ...
... The number of lines drawn leaving a positive charge or ending on a negative charge is proportional to the magnitude of the charge No two field lines can cross each other ...
NewAS Revision Unit 1
... specific charge? Proton Number Z is the number of protons in the nucleus. The Nucleon or Mass Number A is the total number of protons and neutron in the nucleus. The Specific Charge is the ratio of charge to mass for an particle or ion in C/kg ...
... specific charge? Proton Number Z is the number of protons in the nucleus. The Nucleon or Mass Number A is the total number of protons and neutron in the nucleus. The Specific Charge is the ratio of charge to mass for an particle or ion in C/kg ...
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.