Physics for Scientists and Engineers II, Summer Semester 2009 1 Lecture 15: June 24 th 2009 Physics for Scientists and Engineers II.

Slides:

Advertisements

Similar presentations

Lenzs Law. Minus Sign There is a minus sign in Faradays Law. There is a minus sign in Faradays Law. Relates flux change to polarity of emfRelates flux.

Advertisements

Chapter 10 Time-Varying Fields and Maxwell’s Equations Two New Concepts: The electric field produced by a changing magnetic field (Faraday) The magnetic.

Happyphysics.com Physics Lecture Resources Prof. Mineesh Gulati Head-Physics Wing Happy Model Hr. Sec. School, Udhampur, J&K Website: happyphysics.com.

Induced Voltages And Inductance Chapter 20 Hans Christian Oersted.

Faraday’s Law PH 203 Professor Lee Carkner Lecture 19.

Electromagnetic Induction

Magnetic Fields Faraday’s Law

Physics for Scientists and Engineers II, Summer Semester Lecture 14: June 22 nd 2009 Physics for Scientists and Engineers II.

Lecture 24 Last Lecture Dynamic Filed Faraday’s Law Stationary loop in a time-varying Magnetic field Exam III, Nov. 24, Monday, 12:30 –1:30pm, SW.

Physics for Scientists and Engineers II, Summer Semester Lecture 16: June 29 th 2009 Physics for Scientists and Engineers II.

Physics for Scientists and Engineers II, Summer Semester Lecture 12: June 17 th 2009 Physics for Scientists and Engineers II.

Copyright © 2007, Pearson Education, Inc., Publishing as Pearson Addison-Wesley. Electromagnetic induction Lenz’s law Faraday’s law The nature of electromagnetic.

Induced EMF and Inductance 1830s Michael Faraday Joseph Henry.

Physics for Scientists and Engineers II, Summer Semester Lecture 10: June 12 th 2009 Physics for Scientists and Engineers II.

Physics for Scientists and Engineers II, Summer Semester Lecture 8: June 8 th 2009 Physics for Scientists and Engineers II.

Magnetism Lenz’s Law 1 Examples Using Lenz’s Law.

Electromagnetism Physics 100 Chapt 15 Michael Faraday.

Lecture 23 Today Dynamic Filed Faraday’s Law Stationary loop in a time-varying Magnetic field.

Physics 24-Winter 2003-L181 Electromagnetic Induction Basic Concepts Faraday’s Law (changing magnetic flux induces emf) Lenz’s Law (direction of induced.

Chapter 31 Faraday’s Law.

Physics for Scientists and Engineers II, Summer Semester Lecture 13: June 19 th 2009 Physics for Scientists and Engineers II.

Physics for Scientists and Engineers II, Summer Semester Lecture 11: June 15 th 2009 Physics for Scientists and Engineers II.

Physics for Scientists and Engineers II, Summer Semester 2009 Lecture 4: May 27 th 2009 Physics for Scientists and Engineers II.

Induction experiments(sec. 29.1) Faraday’s law (sec. 29.2) Lenz’s law(sec. 29.3) Motional electromotive force(sec. 29.4) Induced electric fields(sec. 29.5)

TOC 1 Physics 212 Lenz's Law Lenz’s Law Examples Using Lenz’s Law.

Faraday’s Law of Induction II Physics 2415 Lecture 20 Michael Fowler, UVa.

A topic (in two parts) about the interaction between magnetic fields

Chapter 22 Electromagnetic Induction. 1) Induced emf and induced current Changing B-field induces current.

© 2005 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors in teaching their.

-Lenz’s Law -Induced Current and Electric Fields

Chapter 31 Faraday’s Law. Induced Fields Magnetic fields may vary in time. Experiments conducted in 1831 showed that an emf can be induced in a circuit.

Chapter 31 Faraday’s Law. Introduction This section we will focus on the last of the fundamental laws of electromagnetism, called Faraday’s Law of Induction.

Chapter 22: Electromagnetic Induction Essential Concepts and Summary.

Motional EMF This is the emf induced in a conductor moving through a magnetic field. Examples on sheet 10 To change the magnetic flux we can change: 1.the.

Copyright © 2007 Pearson Education, Inc., publishing as Pearson Addison-Wesley PowerPoint ® Lecture prepared by Richard Wolfson Slide Electromagnetic.

1 Electromagnetic Induction We introduced motional emf and Faraday’s Law through these two examples: Today we will the discussion about Faraday’s Law of.

Faraday's Law dS B.

Maxwell’s Equations (so far…) *Not complete. for fields made by charges at rest. Can a distribution of static charges make this field? Electrostatic forces.

Chapter 31 Faraday’s Law Electricity generator, or from B to E. 1.Battery  Chemical emf 2.Motional emf 3.Faraday’s Law of Induction 4.Lentz Law about.

Induction II. Law of Induction The magnitude of the induced emf in a circuit is equal to the rate at which the magnetic flux through the circuit is.

AP Physics Chapter 21 Electromagnetic Induction, Faraday’s Law, and AC Circuits An electric current produces a magnetic field and a magnetic field exerts.

Today’s agenda: Induced emf. You must understand how changing magnetic flux can induce an emf, and be able to determine the direction of the induced emf.

Electromagnetic Induction AP Physics Chapter 21. Electromagnetic Induction 21.1 Induced EMF.

Electromagnetic Induction

Faraday’s Law and Inductance. Faraday’s Law A moving magnet can exert a force on a stationary charge. Faraday’s Law of Induction Induced emf is directly.

Electro- magnetic Induction Lecture 3 AP Physics.

Lecture 23—Faraday’s Law Electromagnetic Induction AND Review of Right Hand Rules Monday, March 30.

Unit 5: Day 9 – Energy Stored in a Magnetic Field of an Inductor Power delivered by an inductor Work done to increase the current in an inductor The energy.

Electromagnetic Induction and Faraday’s Law

Lecture 23 Static field Dynamic Field Lecture 23 Faraday’s Law.

Lesson 9 Faraday’s Law  Faraday’s Law of Induction  Motional EMF  Lenz’s Law  Induced EMF’s and Induced Electric Fields  Eddy Currents.

Chapter 31 Faraday’s Law. Faraday’s Law of Induction – Statements The emf induced in a circuit is directly proportional to the time rate of change of.

Chapter 31 Faraday’s Law.

Ampere’s Law in Magnetostatics

Magnetic Induction. Key Points about Induction  If the current in the primary circuit is constant, then the current in the secondary circuit is zero.

Faraday’s Law.

Chapter 30 Lecture 30: Faraday’s Law and Induction: I.

APHY201 1/4/ Induced EMF   A changing magnetic field will induce an emf which produces a current.

Electromagnetic Induction. Induced current/emf(voltage) Current or voltage produced by a changing magnetic field.

CH Review Changing the magnetic flux in a coil induces an emf around the coil. (As long as the coil is connected in a complete circuit, a current.

Last time Gauss' Law: Examples (Ampere's Law) 1. Ampere’s Law in Magnetostatics The path integral of the dot product of magnetic field and unit vector.

P202c30: 1 Chapter30: Electromagnetic Induction Motional EMF’s Conductor Moving through a magnetic field Magnetic Force on charge carriers Accumulation.

Electromagnetic Induction – Learning Outcomes  Define magnetic flux.  Solve problems about magnetic flux.  State Faraday’s Law.  HL: Solve problems.

Electromagnetic Induction and Faraday’s Law Chapter 21.

Induction and Inductance

My Favorite Subject : Electromagnetism Vector Fields Coulomb’s Law Electric Potential Gauss Law Capacitance and Dielectric Current.

Motors and Generators Physics 12 Adv.

Today’s agenda: Induced emf. Faraday’s Law. Lenz’s Law. Generators.

Presantion prepared by ibrar ahmad bs physics Induced Electric Fields. om.

Chapter 30 Induction and Inductance

Presentation transcript:

Physics for Scientists and Engineers II, Summer Semester Lecture 15: June 24 th 2009 Physics for Scientists and Engineers II

Physics for Scientists and Engineers II, Summer Semester Motional emf (Rotational Motion O

Physics for Scientists and Engineers II, Summer Semester Lenz’s Law Assume for a moment that it was otherwise: then, a small increase in the magnetic field\ would create a current that produces a magnetic field that is increasing in the same direction. This increase would fuel another increase in current etc.  We would have a runaway effect in which the current would get so large that the ring would melt down. This cannot be so as can easily be seen From a conservation of energy view point. WRONG!!

Physics for Scientists and Engineers II, Summer Semester Lenz’s Law Correct !! The current induced creates a magnetic field that is opposite to  B.

Physics for Scientists and Engineers II, Summer Semester Faraday’s Law in General Form E is a non-conservative field (unlike the electrostatic field produced by stationary charges.

Physics for Scientists and Engineers II, Summer Semester Eddy Currents Eddy current demonstrations. Review