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Physics 2 for Engineering Week 5

by: Aubrey Kenderdine

Physics 2 for Engineering Week 5 PHYS 1155

Marketplace > Northeastern University > Physics > PHYS 1155 > Physics 2 for Engineering Week 5
Aubrey Kenderdine
Northeastern University

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About this Document

Last material covered that will be on the midterm (review study guide to come this weekend). Includes lecture notes, learning catalytics problems, ILS Lecture, Pre and post ILS questions
Physics for Engineering 2
Latika Menon
Class Notes
Charge, Capacitors, Voltages, Physics, MCAT Physics, General Physics, Energy, Series, Engineering, Bionengineering
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This 8 page Class Notes was uploaded by Aubrey Kenderdine on Friday October 14, 2016. The Class Notes belongs to PHYS 1155 at Northeastern University taught by Latika Menon in Fall 2016. Since its upload, it has received 15 views. For similar materials see Physics for Engineering 2 in Physics at Northeastern University.


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Date Created: 10/14/16
Week 5 Physics 2 for Engineering Chapter 24: Capacitance and Dielectrics Capacitors store charge C = Q/V Unit is Farads, 1 Farad = 1 C/V Review: Q = σ A V = Ed Parallel Plate Capacitor C = A Ɛ / 0 C = Q/V = σ A/ Ed = A Ɛ / d 0 Capacitors in series Charge on each capacitor is the same Voltage on each capacitor is different Applied voltage is equal to the sum of voltages on the two capacitors (V = V +V ) 1 2 1/C eq1/C +11C 2 Capacitors in parallel Voltage (potential) on each capacitor is the same Charge on each capacitor is different (Q = Q +Q ) 1 2 C eq +C1 2 Energy stored in capacitor U= (1/2) Q / C= (1/2) C V = (1/2) Q V Energy density u = U/V= (1/2) Ɛ E 2 0 Dielectric when charge Q is constant Dielectric constant (of specific material) K=V /V=0/C 0 E = (σ- σ)i/ Ɛ 0where σ is the induced charge) Spherical capacitor C = 4π Ɛ (r0r a br - ra)) b Cylindrical capacitor C = 2π Ɛ L 0 (ln (r / b ))a


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