B due to a moving point charge where  0 = 4  x10 -7 T.m/A Biot-Savart law: B due to a current element B on the axis of a current loop B inside a solenoid.

Slides:

Advertisements

Similar presentations

Magnetism Alternating-Current Circuits

Advertisements

F=BqvsinQ for a moving charge F=BIlsinQ for a current

Fisica Generale - Alan Giambattista, Betty McCarty Richardson Copyright © 2008 – The McGraw-Hill Companies s.r.l. 1 Chapter 20: Electromagnetic Induction.

Magnetic Flux Let us consider a loop of current I shown in Figure(a). The flux  1 that passes through the area S 1 bounded by the loop is Suppose we pass.

Walker, Chapter 23 Magnetic Flux and Faraday’s Law of Induction

Magnetic Fields Faraday’s Law

Electromagnetic Induction

Biot-Savart Law The Field Produced by a Straight Wire.

Self Inductance. Solenoid Flux  Coils of wire carrying current generate a magnetic field. Strong field inside solenoidStrong field inside solenoid 

Induced EMF and Inductance 1830s Michael Faraday Joseph Henry.

Copyright © 2009 Pearson Education, Inc. Lecture 9 – Electromagnetic Induction.

PHYS 270 – SUPPL. #7 DENNIS PAPADOPOULOS FEBRUARY 17,

Physics 121: Electricity & Magnetism – Lecture 11 Carsten Denker NJIT Physics Department Center for Solar–Terrestrial Research.

In the circuit below, suppose the switch has been in position A for a very long time. If it is then switched to B at t=0, find the current as a function.

Current carrying wires 1820 Hans Christian Oersted Hans Christian Ørsted.

Biot-Savart Law The Field Produced by a Straight Wire.

Physics 2415 Lecture 22 Michael Fowler, UVa

Chapter 29 Electromagnetic Induction and Faraday’s Law HW#9: Chapter 28: Pb.18, Pb. 31, Pb.40 Chapter 29:Pb.3, Pb 30, Pb. 48 Due Wednesday 22.

Physics 2102 Inductors, RL circuits, LC circuits Physics 2102 Gabriela González.

Physics 121: Electricity & Magnetism – Lecture 11 Induction I Dale E. Gary Wenda Cao NJIT Physics Department.

Electromagnetic Induction

Unit 5: Day 8 – Mutual & Self Inductance

AP Physics C Montwood High School R. Casao

Chapter 30 Inductance. Self Inductance When a time dependent current passes through a coil, a changing magnetic flux is produced inside the coil and this.

Magnetic Flux and Faraday’s Law of Induction. Questions 1.What is the name of the disturbance caused by electricity moving through matter? 2.How does.

Sources of the Magnetic Field

Chapter 20 Induced Voltages and Inductance. Faraday’s Experiment A primary coil is connected to a battery and a secondary coil is connected to an ammeter.

Inductance and Magnetic Energy Chapter 32 Mutual Inductance Self-Inductance Inductors in Circuits Magnetic Energy.

Physics 2102 Lecture 18 Ch30: Inductors & Inductance II Physics 2102 Jonathan Dowling Nikolai Tesla.

Lecture 18-1 Ways to Change Magnetic Flux Changing the magnitude of the field within a conducting loop (or coil). Changing the area of the loop (or coil)

AP Physics C III.E – Electromagnetism. Motional EMF. Consider a conducting wire moving through a magnetic field.

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.

Chapter 30 Induction and Inductance. 30.2: First Experiment: 1. A current appears only if there is relative motion between the loop and the magnet (one.

A circular loop of wire is in a region of spatially uniform magnetic field. The magnetic field is directed into the plane of the figure. If the magnetic.

Physics 2102 Magnetic fields produced by currents Physics 2102 Gabriela González.

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

Copyright © 2009 Pearson Education, Inc. Chapter 32: Inductance, Electromagnetic Oscillations, and AC Circuits.

My Chapter 20 Lecture Outline.

Electro- magnetic Induction Lecture 3 AP Physics.

Electromagnetic Induction Lenz’s discovery Faraday’s law example ways to change flux WB - EMF WB Direction.

Chapter 20 Electromagnetic Induction. Electricity and magnetism Generators, motors, and transformers.

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.

9. Inductance M is a geometrical factor! L is a geometrical factor!

Chapter 28 Inductance; Magnetic Energy Storage. Self inductance 2 Magnetic flux Φ B ∝ current I Electric currentmagnetic fieldEMF (changing) Phenomenon.

Magnetism Alternating-Current Circuits

Chapter 30 Induction and Inductance. 30.2: First Experiment: 1. A current appears only if there is relative motion between the loop and the magnet (one.

Chapter 30 Lecture 31: Faraday’s Law and Induction: II HW 10 (problems): 29.15, 29.36, 29.48, 29.54, 30.14, 30.34, 30.42, Due Friday, Dec. 4.

Magnetic Fields. Magnetic Fields and Forces a single magnetic pole has never been isolated magnetic poles are always found in pairs Earth itself is a.

Electromagnetic Induction FaradayLenz. Why does Electromagnetic Induction Occur? Horizontal Magnetic Field Move wire down I - + I.

Physics 1202: Lecture 12 Today’s Agenda Announcements: –Lectures posted on: –HW assignments, solutions.

Lecture 10 Induction Applications Chapter 20.6  20.8 Outline Self-Inductance RL Circuits Energy Stored in a Magnetic Field.

Inductors ? circuit diagram symbol.

1 Magnetic flux [weber Wb], defines the amount of magnetic field (B [Tesla]) which travels perpendicular to an area A [m 2 ] Symbol: Ф Unit: Weber Wb A.

1 Mid-term review Charges and current. Coulomb’s Law. Electric field, flux, potential and Gauss’s Law. Passive circuit components.  Resistance and resistor,

Electromagnetism.  A moving charge creates a magnetic field  Electric current (I) is moving electrons, so a current-carrying wire creates a magnetic.

Right-hand Rule 2 gives direction of Force on a moving positive charge Right-Hand Rule Right-hand Rule 1 gives direction of Magnetic Field due to current.

Electromagnetic induction Objectives: 1.Describe what happens when a coil of wire is placed in a changing magnetic field. 2.Calculate the magnetic flux.

AP Physics C III.E – Electromagnetism. Motional EMF. Consider a conducting wire moving through a magnetic field.

Electromagnetic Induction and Faraday’s Law Chapter 21.

Problem 4 A metal wire of mass m can slide without friction on two parallel, horizontal, conducting rails. The rails are connected by a generator which.

1 Mid-term review Charges and current. Coulomb’s Law. Electric field, flux, potential and Gauss’s Law. Passive circuit components.  Resistance and resistor,

Chapter 30: Induction and Inductance This chapter covers the following topics: -Faraday’s law of induction -Lenz’s Law -Electric field induced by a changing.

Electromagnetic Induction.  = BA  = BA cos  Magnetic flux: is defined as the product of the magnetic field B and the area A of the.

Lecture 3-6 Self Inductance and Mutual Inductance

Electromagnetic induction

Energy in a capacitor is stored

Electromagnetic Induction and Faraday’s Law.

9. Inductance M is a geometrical factor! L is a geometrical factor!

Electricity and Magnetism

Presentation transcript:

B due to a moving point charge where  0 = 4  x10 -7 T.m/A Biot-Savart law: B due to a current element B on the axis of a current loop B inside a solenoid B =  0 nI, where n =N/ B due to an infinite long straight wire Ampere’s Law: Note: Ampere’s law is valid only if currents are continuous with a high degree of symmetry We used Ampere’s law to determine magnetic fields for an infinite straight wire, a solenoid, and inside and outside a wire. Magnetic force on a current element

Right-hand rule: The magnetic lines of B curl around a current- carrying wire in the same direction as the fingers of the right-hand when the thumb points in the direction of the current as shown. Magnetic lines due to a current in circular coil. If you are standing to the left of the picture, the current in the coil is clockwise

Magnetic flux: In weber (Wb), 1Wb = 1 T.m 2 If a plane surface of area A and constant B with an angle  between directions of A and B If there are N turns Faraday’s Law: Lenz’s Law: The direction of the induced current is such that the induced field is to oppose the change in the original magnetic flux.

Inductance: Self-inductance: Self-inductance of a solenoid: Mutual inductance: Units of inductance: Henry (H) 1H = 1 Wb/A = 1 T.m 2 /A For example, the mutual inductance for The outer solenoid is

Magnetic energy stored in a inductor: Magnetic energy density: AC generator: emf generated: rms current: AC in a resistor: AC in an inductor: AC in a capacitor: Inductive reactance: X L =  LCapacitive reactance: X C = 1/  C Average power Dissipation: