PPE13_PotentialPlate - Potential Electric Potential of Charged Plates RHJansen Potential Potential V is an electricity variable that has no

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Potential Potential Electric Potential of Electric Potential of Charged Plates Charged Plates © RHJansen
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Potential © RHJansen Potential V is an electricity variable that has no mechanics counterpart. Potential: V is measured in volts V (example: a potential of 2 volts, is written V = 2V) Potential is commonly called Voltage , but there are many ways to say potential. Electrostatic potential , electric potential , or just plain potential . One important version is Potential Difference . This is specifically the change in potential and is the variable Δ V . A more obscure variant is electromotive force, emf, ε . We will see this version used for batteries and generates that create electric potential. V = Εδ gh = ?
Background image of page 2
Potential Energy and Potential © RHJansen m g h ground + sky q E d + + + + + + + m g ∆η = 1 2 μω 2 q Εδ ( 29 = 1 2 2 q ς = 1 2 2 W g = ∆Υ γ = μ γ∆η W E = ∆Υ Ε = θ∆ ( 29 W E = ∆Υ = θ∆ U g = μ γη U E = θ U E = θ Gravity Electricity
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
What exactly is Potential ? © RHJansen Potential can be thought of as electrical pressure (like water pressure). Water pressure from the water company movse water to your home. Electrical pressure from the power company moves electricity to your home. The term “high voltage” means that there is a “high potential (high likelihood)” that electricity will move from a high to a low potential. Potential does not harm you. It is a measure of the pressure on the charges and thus the likelihood that charges will move from an object labeled “high voltage” to you. (It pretty much means: Don’t get close to me. I have the ability send lightening bolts at any object with less potential than me.) The size of the lightening bolt (next chapter: current or flow of charge) determines whether injury or death occurs.
Background image of page 4
Example 1 © RHJansen Parallel plates have an electric field E = 20 N/C and are separated by a distance d = 10 cm. a. Determine the potential difference between the plates. b. A proton starts at rest at the positive plate. Determine its speed when it reaches the negative plate. We can do this with force and kinematics. ∆ς = Ε∆δ ∆ς = 20 ( 29 0.10 ( 29 ∆ς = 2.0 ς q ∆ς = 1 2 μω 2 1.6 10 -19 ( 29 2.0 ( 29 = 1 2 1.67 10 -27 ( 29 ω 2 ΣΦ = Φ Ε ma = θΕ v 2 = ω 0 2 + 2α∆ξ v = 2α∆ξ U E = Κ Or, try energy. v = 1.96 10 4 μ σ
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Example 2 © RHJansen The charged plates shown have a potential difference of 20 V. Determine the speed of the proton exiting the plates. Potential V is given. Use the version of conservation of energy that groups Ed together as V .
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 07/21/2009 for the course PHYSICS 7B taught by Professor Packard during the Spring '08 term at University of California, Berkeley.

Page1 / 24

PPE13_PotentialPlate - Potential Electric Potential of Charged Plates RHJansen Potential Potential V is an electricity variable that has no

This preview shows document pages 1 - 7. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online