Inductor. Physical Coil  A circuit component designed for inductance is an inductor. Symbol suggests coiled wireSymbol suggests coiled wire  Ideal inductors.

Slides:

Advertisements

Similar presentations

AP Physics C Montwood High School R. Casao

Advertisements

Energy In a Magnetic Field

Chapter 11 Inductors.

Inductance Self-Inductance RL Circuits Energy in a Magnetic Field

Unit 5 Day 11: RL Circuits Series RL Circuit Layout Current and Voltage Response vs. Time when V 0 is applied Current & Voltage Response vs. Time during.

Instrumentation (AMME2700) 1 Instrumentation Dr. Xiaofeng Wu.

PHY1013S INDUCTANCE Gregor Leigh

Inductors. Stored energy. LR circuit.

The current through the inductor can be considered a sum of the current in the circuit and the induced current. The current in the circuit will be constant,

Lecture Ten Physics 100 Fall 2012  Series and Parallel Circuits.

Kirchhoff’s laws. Kirchhoff’s laws: current law: voltage law: Equations.

Fundamentals of Circuits: Direct Current (DC)

DC circuits Physics Department, New York City College of Technology.

RL Circuits PH 203 Professor Lee Carkner Lecture 21.

CAPACITOR AND INDUCTOR

W12D1: RC and LR Circuits Reading Course Notes: Sections , , , ,

Electric current and direct-current circuits A flow of electric charge is called an electric current.

Ch. 30 Inductance AP Physics. Mutual Inductance According to Faraday’s law, an emf is induced in a stationary circuit whenever the magnetic flux varies.

Chapter 20: Circuits Current and EMF Ohm’s Law and Resistance

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

Direct Current When the current in a circuit has a constant direction, the current is called direct current Most of the circuits analyzed will be assumed.

1 DC ELECTRICAL CIRCUITS INDUCTANCE. 2 DC ELECTRICAL CIRCUITS When current travels down a conductor it creates a magnetic field around the conductor,

-Self Inductance -Inductance of a Solenoid -RL Circuit -Energy Stored in an Inductor AP Physics C Mrs. Coyle.

Inductors. Energy Storage Current passing through a coil causes a magnetic field  Energy is stored in the field  Similar to the energy stored by capacitors.

INDUCTANCE. When the current in a loop if wire changes with time, an emf is induced in the loop according to Faraday’s law. The self- induced emf is Ɛ.

My Chapter 18 Lecture Outline.

Chapter 32 Inductance. Self-inductance  A time-varying current in a circuit produces an induced emf opposing the emf that initially set up the time-varying.

Unit 14 Magnetic Induction. Objectives: Discuss magnetic induction. List factors that determine the amount and polarity of an induced voltage. Discuss.

Series Circuits Circuits in which there is only one path for current to flow through All elements of the circuit (resistors, switches etc…) are in the.

FCI. Direct Current Circuits: 3-1 EMF 3-2 Resistance in series and parallel. 3-3 Rc circuit 3-4 Electrical instruments FCI.

Circuits Chapter 23.

Physics 121 Practice Problem Solutions 12 Inductance

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)

Chapter 32 Inductance L and the stored magnetic energy RL and LC circuits RLC circuit.

Exam review Inductors, EM oscillations

DC Circuits. EMF and Terminal Voltage Electric circuit needs a battery or generator to produce current – these are called sources of emf. Battery is a.

Inductors An inductor is essentially a coil of wire with an iron core.

EE 1270 Introduction to Electric Circuits Suketu Naik 0 EE 1270: Introduction to Electric Circuits Lecture 2: Ohm's Law Chapter 2 Circuit Elements.

RESISTANCE OF A SYSTEM OF RESISTORS Resistance can be joined to each other by two ways: Electricity Combination of Resistors 1. Series combination 2. Parallel.

Chapter 32 Inductance. Self-inductance Some terminology first: Use emf and current when they are caused by batteries or other sources Use induced emf.

INDUCTANCE. When the current in a loop if wire changes with time, an emf is induced in the loop according to Faraday’s law. The self- induced emf is Ɛ.

2 But what makes the electrons flow? Any electrical circuit requires three things 1.A source 2.A load 3.A means of transmission A definition of a current.

R-L Circuits. R-L Circuits? What does the “L” stand for? Good Question! “L” stands for the self-inductance of an inductor measured in Henrys (H). So…What.

What is the equivalent resistance of this circuit? What is the current running through the first resistor? What is the potential difference drop across.

1 Summary of Circuits Theory. 2 Voltage and Current Sources Ideal Voltage Source It provides an output voltage v s which is independent of the current.

Kirchhoff’s Laws Kirchhoff’s Current Law Kirchhoff’s Voltage Law Series Circuits Parallel Circuits Polarity.

An inductor is a wire coil usually wrapped around an iron core

Monday, April 23, PHYS , Spring 2007 Dr. Andrew Brandt PHYS 1444 – Section 004 Lecture #19 Monday, April 23, 2007 Dr. Andrew Brandt Inductance.

DC Circuits Series and parallel rules for resistors Kirchhoff’s circuit rules.

Unit 16 Inductance in AC Circuits

Circuits. The Basics The Symbols Wire Resistor Light Bulb Plug Battery Open Switch Closed Switch Capacitor.

Thursday August 2, PHYS 1444 Ian Howley PHYS 1444 Lecture #15 Thursday August 2, 2012 Ian Howley Dr. B will assign final (?) HW today(?) It is due.

1 §18.1 Electric Current e-e- e-e- e-e- e-e- e-e- e-e- e-e- e-e- A metal wire. Assume electrons flow to the right. Current is a measure of the amount of.

Internal Resistance Review Kirchhoff’s Rules DC Electricity.

Glencoe Physics Chapter 23 ”Circuits and Circuit Elements"

Chapter 19 DC Circuits. EMF and Terminal Voltage Any device that can transform a type of energy into electric energy is called a source of electromotive.

Chapter 21 Magnetic Induction and Chapter 22.9: Transformers.

Using IB symbols - sketch a series circuit including

Inductance and Capacitance Response of First Order RL and RC

Direct Current Circuits

Resistance in Circuits

Lecture 2 - Circuit Elements and Essential Laws

ECE 1270: Introduction to Electric Circuits

Lecture 2 - Circuit Elements and Essential Laws

Electric Circuits Chapter 35.

Electric Current Pages

Presentation transcript:

Inductor

Physical Coil  A circuit component designed for inductance is an inductor. Symbol suggests coiled wireSymbol suggests coiled wire  Ideal inductors act like wires unless the current changes. Emf based on LEmf based on L  Real inductors have some resistance. Resistivity of length of wireResistivity of length of wire

RL Circuit  An inductor resists changes in current. Creates emf  A switch can be used to complete a circuit with a resistor. One-loop Kirchhoff’s law Treat as additional emf source R I(t)I(t) V L

Inductive Time Constant  The voltage across an inductor falls with time. Change in current decreasesChange in current decreases Never reaches zeroNever reaches zero Overall current increasesOverall current increases  The period of time for a decrease by a factor of e is the time constant .

Exponential Decay  The emf of an inductor can be represented by an exponential curve. Depends on battery voltageDepends on battery voltage

Inductor Current  Inductor and resistor voltages sum to battery voltage. Kirchhoff’s voltage law  Circuit current can be determined from Ohm’s law

Disconnection  Opening a switch with current flowing is a change in current.  The inductor will create an emf to resist the change.  For a large current the emf can create a spark. R I(t)I(t) V L

Safe Discharge  A pair of opposite switches can provide a safe path for current in an inductor. A and B always in opposite positionA and B always in opposite position  When switch A is closed the battery powers the circuit.  When switch B is closed the inductor current flows through the switch and resistor. R I(t)I(t) V L SASA SBSB