AP_Physics_B_-_Electric_Fields_and_Forces

AP_Physics_B_-_Electric_Fields_and_Forces -...

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    Electric Fields and Forces AP Physics B
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Electric Charge “Charge” is a property of subatomic particles. Facts about charge: There are 2 types basically, positive (protons) and negative (electrons) LIKE charges REPEL and OPPOSITE charges ATTRACT Charges are symbolic of fluids in that they can be in 2 states, STATIC or DYNAMIC.
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Electric Charge – The specifics Some important constants: •The symbol for CHARGE is “q” •The unit is the COULOMB(C), named after Charles Coulomb •If we are talking about a SINGLE charged particle such as 1 electron or 1 proton we are referring to an ELEMENTARY charge and often use, e , to symbolize this. Particle Charge Mass Proton 1.6x10 -19 C 1.67 x10 -27 kg Electron 1.6x10 -19 C 9.11 x10 -31 kg Neutron 0 1.67 x10 -27 kg
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Charge is “CONSERVED” Charge cannot be created or destroyed only transferred from one object to another. Even though these 2 charges attract initially, they repel after touching. Notice the NET charge stays the same.
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Conductors and Insulators The movement of charge is limited by the substance the charge is trying to pass through. There are generally 2 types of substances. Conductors: Allow charge to move readily though it. Insulators: Restrict the movement of the charge Conductor = Copper Wire Insulator = Plastic sheath
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Charging and Discharging There are basically 2 ways you can charge something. 1. Charge by friction 2. Induction BIONIC is the first-ever ionic formula mascara. The primary ingredient in BIONIC is a chain molecule with a positive charge. The friction caused by sweeping the mascara brush across lashes causes a negative charge. Since opposites attract, the positively charged formula adheres to the negatively charged lashes for a dramatic effect that lasts all day.”
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AP_Physics_B_-_Electric_Fields_and_Forces -...

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