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Electrical Unit Review

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Ions An atom that has gained an electron (more negative) is called a negative ion An atom that has gained an electron (more negative) is called a negative ion An atom that has lost an electron (more positive) is called a positive ion An atom that has lost an electron (more positive) is called a positive ion Electrons are the only part of the atom that moves Electrons are the only part of the atom that moves

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Electricity Study of Electricity is called electrostatics Study of Electricity is called electrostatics Electricity is the movement of electrons from one object to another Electricity is the movement of electrons from one object to another

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Two Types of Electricity Static electricity – electrons do not move freely, usually stays in one spot Static electricity – electrons do not move freely, usually stays in one spot Current electricity – electrons do move freely, this is found in a circuit Current electricity – electrons do move freely, this is found in a circuit

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Static Electricity Insulators – electrons do not move easily (the charge will stay where it was created) Insulators – electrons do not move easily (the charge will stay where it was created) Conductors – electrons can move freely over the object Conductors – electrons can move freely over the object

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Static Electricity Electrostatic series table (will be given) – the object on the top is always positive the object on the bottom is always negative Electrostatic series table (will be given) – the object on the top is always positive the object on the bottom is always negative

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Static Electricity Three ways of charging an object: Three ways of charging an object: –Charge by friction (rubbing) –Charge by contact (just by touching) –Charge by induction (when the object is brought close but does not touch)

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Static Electricity Two major ways of discharging an object: Two major ways of discharging an object: –By Grounding –By discharging at a point

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Current Electricity Parts of a circuit: Know how to draw them and what they do. Parts of a circuit: Know how to draw them and what they do. 1) Electrical Load- Converts energy 2) Electrical Source - Provides energy (electricity flows from the negative to the positive) 3) Electrical Switch - turns on and off the circuit 4) Wire - pathway

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Current Electricity What is Ohms LawV= IxR What is Ohms LawV= IxR

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Current Electricity NameUnit Symbol in Ohm’s Law VoltageVV CurrentAI ResistanceΩR

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Current Electricity What is Electrical Energy, What is its unit, what is the equation to find it What is Electrical Energy, What is its unit, what is the equation to find it 1)Electrical energy is the movement of energy from the electron to the load 2)Joule 3)E = V x I x t (sec)

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Current Electricity What is Power, its unit, what is the equation What is Power, its unit, what is the equation 1) Power is the rate at which an object uses energy 2) Watts 3) P = V x I

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Current Electricity You need 5 things per question to get 5 points: You need 5 things per question to get 5 points: 1) LIST 2) FORMULA (the one you will use) 3) SHOW WORK/CORRECT ANSWER 4) UNITS EVERYWHERE 5) SENTENCE

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