Electric Potential & U _{E} Lesson 04 |

OPENING QUESTIONS: None today OBJECTIVES: See Below WORDS/FORMULAE FOR TODAY Terms:
Constants:
Formulae: - Electric Potential (V) and Electric Potential Energy (U
_{E})- ∆U = -q∫E ∙ ds
- V
_{b}- V_{a}= ∆V = ∆U/q = -∫E ∙ ds - W = q∆V = -U
_{E} - V = k
_{e}∑q_{i}/r_{i}(between some point in space and each charged particle present in that region of space) - V = ∫k
_{e}dq/r - U
_{E}= k_{e}∑q_{1}q_{2}/r_{i}(between each particle in space and every other particle in that region of space) - E
_{x}= -dV/dx
- Electrical Force:
- F
_{e}= (k_{e}q_{1}q_{2})/r^{2} - F
_{e}=qE
- F
- Electrical Field:
- E = F
_{e}/ q_{o}where q_{o}= a positive test charge - E= (k
_{e}q)/r^{2}
- E = F
- Gauss's Law:
Φ = ∮E ∙A dA Φ = q _{in}/ε_{o}: the electric flux through an ENTIRE gaussian surface is equal to the algebraic sum of the charges INSIDE the surface divided by the permitivity of free space
WORK O' THE DAY (revised): Please review each other's homework from yesterday... Make SURE you can do the integration. Pay particular attention to using λ as a way to 'build a bridge' between different variables... for example if you are integrating dq/r, you MUST have q in terms of r or r in terms of q. λ lets us do that. I have thes following questions printed out. 1) What is the significance of use 2a) Compare electric potential (voltage) and potential energy. 2b) Contrast electric potential (voltage) and potential energy. 3) When we integrate Eds, why is the upper limit " 4) How do we calculate electric force in terms of the electric field? 5) What is Coulomb's Law? 6) What is the numeric value of the electrical constant? 6b) What is the more symbol-based value of the electrical constant? 7) When your * ∮EcosθdA as a check list, what the heck is he talking about? 7) We can 8) Oh and by the way ( 9) When you ( 10) What is the significance of the surface integral: ∮? 11) What is the definition of electric potential? (trick question: how is it different from potential difference?) 12) What is the relationship between voltage and work? 13) What are the various mathematical equations that relate Efield to voltage? (show me at least 3) 14) What is the relationship between multiple point charges and voltage? 15) What integral gives us that relationship? 16) What is the relationship between voltage and potential energy? |

STUDY GUIDE: |