Lecture12 - Physics 102 Lecture 12 Inductors and AC Circuits L R C Mutual Inductance AC Generator Changing current in P Changing B-field thru P

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
Physics 102: Lecture 12 L R C Inductors and AC Circuits
Background image of page 1

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

View Full DocumentRight Arrow Icon
Mutual Inductance AC Generator Changing current in P Changing B-field thru P Changing B-field thru S Changing Φ thru S Φ S proportional to I P : P rimary Coil S econdary Coil p s I M t ε = - i f i f t t t - Φ - Φ - = ∆Φ - = s p MI Φ = “Mutual Inductance” Induced EMF (voltage) in S Recall Faraday’s law: 10 Demo
Background image of page 2
AC Generator Changing current Changing B-field Changing Φ Φ proportional to I: f i f i f i f i -L I I I L t t t t t t ε Φ - Φ - ∆Φ = - = - = = - - - LI = Φ “Inductance” Self Inductance – Single Coil Induced EMF (voltage) Recall Faraday’s law: Direction Given by Lenz’s Law Opposes change in current 13 Units: [L] = [ ε ] [t] / [I] 1 H = 1V-sec/amp
Background image of page 3

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

View Full DocumentRight Arrow Icon
Inductor resists current change! I L Φ = Recall: Φ =NBA Recall: B= μ o nI A l (# turns) = (# turns/meter) x (# meters) N = n l I nIA N L 0 μ = nNA L o = I NBA L = lA n L o 2 = Energy stored: U = ½ LI 2 Physical Inductor 16
Background image of page 4
except solenoid 2 has twice as many turns as solenoid 1. ACT
Background image of page 5

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

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 01/25/2012 for the course PHYS 102 taught by Professor Lee during the Spring '08 term at University of Illinois, Urbana Champaign.

Page1 / 20

Lecture12 - Physics 102 Lecture 12 Inductors and AC Circuits L R C Mutual Inductance AC Generator Changing current in P Changing B-field thru P

This preview shows document pages 1 - 6. Sign up to view the full document.

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