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chapter 5 est - Coggle Diagram
chapter 5 est
Kirchoffs law
1)= the intensity of a current that flows into an element or a node of an electrical circuit is always equal to the intensity of the current that flows out of the element/node
2) in an electrical circuit, the total energy aquired by the charges from the poer supply is always equal to the total energy transferred by these charges
equivalent resistance: the amount of resistance needed in a single resistor to replace the collection of resistors in a circuit
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electricity
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electrical charges
property of protons and electrons. a proton carries a positive charge, while the electron carries a negative charge
valence electrons can be transferred from one atom to another. A negatively charged body has aquired electrons. Posutuvely charged body has lost
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electrical fields
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electrical fields are invisible, but they can be represented by electrical field lines that show the direction of the force that would be exerted on a positive charge placed in the field
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Magnetizing objects
magnetite is a natural magnet, but it is also possible to make artificial magnets with objects containing iron, nickel, cobalt by exposing them to the magnetic field of another magnet
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a magnet can be DE magnetized by a strong, sharp blow, by heating or by placing it in a magnetic field of opposite polarity
magnetic remanence describes the ability of a material to retain magnetization after the removal of the magnetized field
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FYI steel is a iron carbon alloy, so also may be ferromagnetic
Electromagnetism
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Electro magnets
to transform a solenoid into an electromagnet, a ferromagnetic substance is inserted inside the solenoid creating a core. The magnetic field of the electromagnet comes from both the current of the solenoid and the magnetization of the core material
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coulombs law
states that the strength of the force between two immobile and electrically charged particles is Fe= kq1q2/r^2
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